Remove claim that the project is not represented in the SQL working group

We have a few people involved there now.

Branch
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REL9_1_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/548d197ca751895ec6acbaee611c287ce1d6fe47

Modified Files
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doc/src/sgml/features.sgml |    4 +---
1 files changed, 1 insertions(+), 3 deletions(-)

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	Subject: pgsql: Remove claim that the project is not represented in the SQLwork