pgsql: Remove unused parameter

Remove unused parameter

Apparently, this was never used when
introduced (3dad73e71f08abd86564d5090a58ca71740e07e0).

Discussion: https://www.postgresql.org/message-id/flat/511bb100-f829-ba21-2f10-9f952ec06ead%402ndquadrant.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/c02767d2415d17329e2998a9a182fc240a90b554

Modified Files
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src/bin/pg_basebackup/receivelog.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)