Revert "bz2 Haiku patch"

This reverts commit bc457bb.

Author: extrowerk

ext/bz2/config.m4

@@ -8,9 +8,6 @@ PHP_ARG_WITH(bz2, for BZip2 support,
 if test "$PHP_BZ2" != "no"; then
   if test -r $PHP_BZ2/include/bzlib.h; then
     BZIP_DIR=$PHP_BZ2
-  else
-  if test -r $PHP_BZ2/develop/headers/bzlib.h; then
-    BZIP_DIR=$PHP_BZ2
   else
     AC_MSG_CHECKING(for BZip2 in default path)
     for i in /usr/local /usr; do