Remove useless variable to suppress compiler warning.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/a25ef7a5f68728f7f78f798a98c26b773c45937e

Modified Files
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src/backend/catalog/index.c |    4 +---
1 files changed, 1 insertions(+), 3 deletions(-)

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