pgsql: Remove no-longer-needed ExecCountSlots infrastructure.

Log Message:
-----------
Remove no-longer-needed ExecCountSlots infrastructure.

Modified Files:
--------------
pgsql/src/backend/executor:
execProcnode.c (r1.65 -> r1.66)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execProcnode.c?r1=1.65&r2=1.66)
nodeAgg.c (r1.168 -> r1.169)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeAgg.c?r1=1.168&r2=1.169)
nodeAppend.c (r1.74 -> r1.75)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeAppend.c?r1=1.74&r2=1.75)
nodeBitmapAnd.c (r1.11 -> r1.12)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeBitmapAnd.c?r1=1.11&r2=1.12)
nodeBitmapHeapscan.c (r1.35 -> r1.36)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeBitmapHeapscan.c?r1=1.35&r2=1.36)
nodeBitmapIndexscan.c (r1.31 -> r1.32)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeBitmapIndexscan.c?r1=1.31&r2=1.32)
nodeBitmapOr.c (r1.10 -> r1.11)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeBitmapOr.c?r1=1.10&r2=1.11)
nodeCtescan.c (r1.5 -> r1.6)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeCtescan.c?r1=1.5&r2=1.6)
nodeFunctionscan.c (r1.52 -> r1.53)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeFunctionscan.c?r1=1.52&r2=1.53)
nodeGroup.c (r1.75 -> r1.76)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeGroup.c?r1=1.75&r2=1.76)
nodeHash.c (r1.121 -> r1.122)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeHash.c?r1=1.121&r2=1.122)
nodeHashjoin.c (r1.101 -> r1.102)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeHashjoin.c?r1=1.101&r2=1.102)
nodeIndexscan.c (r1.134 -> r1.135)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeIndexscan.c?r1=1.134&r2=1.135)
nodeLimit.c (r1.39 -> r1.40)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeLimit.c?r1=1.39&r2=1.40)
nodeMaterial.c (r1.69 -> r1.70)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeMaterial.c?r1=1.69&r2=1.70)
nodeMergejoin.c (r1.97 -> r1.98)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeMergejoin.c?r1=1.97&r2=1.98)
nodeNestloop.c (r1.53 -> r1.54)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeNestloop.c?r1=1.53&r2=1.54)
nodeRecursiveunion.c (r1.4 -> r1.5)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeRecursiveunion.c?r1=1.4&r2=1.5)
nodeResult.c (r1.43 -> r1.44)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeResult.c?r1=1.43&r2=1.44)
nodeSeqscan.c (r1.66 -> r1.67)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeSeqscan.c?r1=1.66&r2=1.67)
nodeSetOp.c (r1.31 -> r1.32)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeSetOp.c?r1=1.31&r2=1.32)
nodeSort.c (r1.65 -> r1.66)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeSort.c?r1=1.65&r2=1.66)
nodeSubqueryscan.c (r1.40 -> r1.41)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeSubqueryscan.c?r1=1.40&r2=1.41)
nodeTidscan.c (r1.62 -> r1.63)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeTidscan.c?r1=1.62&r2=1.63)
nodeUnique.c (r1.61 -> r1.62)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeUnique.c?r1=1.61&r2=1.62)
nodeValuesscan.c (r1.9 -> r1.10)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeValuesscan.c?r1=1.9&r2=1.10)
nodeWindowAgg.c (r1.6 -> r1.7)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeWindowAgg.c?r1=1.6&r2=1.7)
nodeWorktablescan.c (r1.7 -> r1.8)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeWorktablescan.c?r1=1.7&r2=1.8)
pgsql/src/include/executor:
executor.h (r1.159 -> r1.160)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/executor.h?r1=1.159&r2=1.160)
nodeAgg.h (r1.30 -> r1.31)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeAgg.h?r1=1.30&r2=1.31)
nodeAppend.h (r1.28 -> r1.29)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeAppend.h?r1=1.28&r2=1.29)
nodeBitmapAnd.h (r1.6 -> r1.7)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeBitmapAnd.h?r1=1.6&r2=1.7)
nodeBitmapHeapscan.h (r1.6 -> r1.7)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeBitmapHeapscan.h?r1=1.6&r2=1.7)
nodeBitmapIndexscan.h (r1.6 -> r1.7)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeBitmapIndexscan.h?r1=1.6&r2=1.7)
nodeBitmapOr.h (r1.6 -> r1.7)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeBitmapOr.h?r1=1.6&r2=1.7)
nodeCtescan.h (r1.2 -> r1.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeCtescan.h?r1=1.2&r2=1.3)
nodeFunctionscan.h (r1.13 -> r1.14)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeFunctionscan.h?r1=1.13&r2=1.14)
nodeGroup.h (r1.33 -> r1.34)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeGroup.h?r1=1.33&r2=1.34)
nodeHash.h (r1.47 -> r1.48)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeHash.h?r1=1.47&r2=1.48)
nodeHashjoin.h (r1.38 -> r1.39)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeHashjoin.h?r1=1.38&r2=1.39)
nodeIndexscan.h (r1.34 -> r1.35)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeIndexscan.h?r1=1.34&r2=1.35)
nodeLimit.h (r1.16 -> r1.17)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeLimit.h?r1=1.16&r2=1.17)
nodeMaterial.h (r1.28 -> r1.29)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeMaterial.h?r1=1.28&r2=1.29)
nodeMergejoin.h (r1.27 -> r1.28)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeMergejoin.h?r1=1.27&r2=1.28)
nodeNestloop.h (r1.28 -> r1.29)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeNestloop.h?r1=1.28&r2=1.29)
nodeRecursiveunion.h (r1.2 -> r1.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeRecursiveunion.h?r1=1.2&r2=1.3)
nodeResult.h (r1.26 -> r1.27)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeResult.h?r1=1.26&r2=1.27)
nodeSeqscan.h (r1.27 -> r1.28)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeSeqscan.h?r1=1.27&r2=1.28)
nodeSetOp.h (r1.16 -> r1.17)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeSetOp.h?r1=1.16&r2=1.17)
nodeSort.h (r1.25 -> r1.26)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeSort.h?r1=1.25&r2=1.26)
nodeSubqueryscan.h (r1.16 -> r1.17)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeSubqueryscan.h?r1=1.16&r2=1.17)
nodeTidscan.h (r1.20 -> r1.21)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeTidscan.h?r1=1.20&r2=1.21)
nodeUnique.h (r1.25 -> r1.26)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeUnique.h?r1=1.25&r2=1.26)
nodeValuesscan.h (r1.5 -> r1.6)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeValuesscan.h?r1=1.5&r2=1.6)
nodeWindowAgg.h (r1.2 -> r1.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeWindowAgg.h?r1=1.2&r2=1.3)
nodeWorktablescan.h (r1.2 -> r1.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/nodeWorktablescan.h?r1=1.2&r2=1.3)