Remove redundant have_pgsql variable

Author: petk

build/php.m4

@@ -1939,8 +1939,7 @@ dnl When not using pkg-config, the optional pgsql-dir is the PostgreSQL base
 dnl install directory or the path to pg_config.
 dnl
 AC_DEFUN([PHP_SETUP_PGSQL],
-[found_pgsql=no
-PKG_CHECK_MODULES([PGSQL], [libpq >= 9.3], [found_pgsql=yes], [
+[PKG_CHECK_MODULES([PGSQL], [libpq >= 9.3], [found_pgsql=yes], [
 dnl Undocumented BC feature: The PGSQL_INCLUDE variable can be also passed to
 dnl configure script to override the PostgreSQL library include directory.
   PHP_EXPAND_PATH([$PGSQL_INCLUDE], [PGSQL_INCLUDE])