Revert --with-pcre-valgrind by default in debug build

After quite a few people reported this option enabled to be in many cases
not handy by default, it's reverted to no by default everywhere. If enabled,
it requires Valgrind dev packages, where just a few have Valgrind itself
installed or care. Still for PCRE related work this option is a must,
though will have to be turned on by hand.

Revert "fix default args for --with-pcre-valgrind"

This reverts commit 24de0fe.

Revert "Enable valgrind support for PCRE by default in debug builds"

This reverts commit 850bb99.

ext/pcre/config0.m4

@@ -78,20 +78,12 @@ PHP_ARG_WITH(pcre-jit,,[  --with-pcre-jit         Enable PCRE JIT functionality]
     fi
   fi
 
-  if test "$PHP_DEBUG" != "no" && test "$PHP_DEBUG" != "0"; then
-    PHP_ARG_WITH(pcre-valgrind,,[  --with-pcre-valgrind=DIR
-                          Enable PCRE valgrind support. Developers only!], yes, no)
-  else
-    PHP_ARG_WITH(pcre-valgrind,,[  --with-pcre-valgrind=DIR
-                           Enable PCRE valgrind support. Developers only!], no, no)
-  fi
-
+PHP_ARG_WITH(pcre-valgrind,,[  --with-pcre-valgrind=DIR
+                          Enable PCRE valgrind support. Developers only!], no, no)
   if test "$PHP_PCRE_REGEX" != "yes" && test "$PHP_PCRE_REGEX" != "no"; then
     AC_MSG_WARN([PHP is going to be linked with an external PCRE, --with-pcre-valgrind has no effect])
   else
-    if test "$PHP_PCRE_VALGRIND" = "no" && test "$PHP_DEBUG" != "0"; then
-      AC_MSG_NOTICE([PCRE Valgrind support is disabled for debug build])
-    elif test "$PHP_PCRE_VALGRIND" != "no" || test "$PHP_DEBUG" != "0"; then
+    if test "$PHP_PCRE_VALGRIND" != "no"; then
       PHP_PCRE_VALGRIND_INCDIR=
       AC_MSG_CHECKING([for Valgrind headers location])
       for i in $PHP_PCRE_VALGRIND $PHP_PCRE_VALGRIND/include $PHP_PCRE_VALGRIND/local/include /usr/include /usr/local/include; do