Remove unused pcre-dir configuration option

Author: jmikola

config.m4

@@ -439,26 +439,6 @@ if test "$MONGODB" != "no"; then
   fi
 
 
-PHP_ARG_WITH(pcre-dir, for pcre-dir install prefix,
-[  --with-pcre-dir[=DIR]     mongodb: pcre install prefix], auto, yes)
-
-if test "$PHP_PCRE_DIR" != "no"; then
-  AC_MSG_CHECKING(for pcre)
-  for i in $PHP_PCRE_DIR /usr /usr/local; do
-    if test -f $i/include/pcre.h; then
-      MONGODB_PCRE_DIR=$i/include
-      AC_MSG_RESULT(found in $i)
-      break
-    fi
-  done
-
-  if test -z "$MONGODB_PCRE_DIR"; then
-    AC_MSG_RESULT(not found)
-  else
-    PHP_ADD_INCLUDE($MONGODB_PCRE_DIR)
-  fi
-fi
-
 PHP_ARG_WITH(mongodb-sasl, for Cyrus SASL support,
 [  --with-mongodb-sasl[=DIR]     mongodb: Include Cyrus SASL support], auto, no)