[php] Remove redundant in typemap for bool

This typemap which would wrap C++ bool as PHP int is later overridden
by another which wraps it as PHP bool.  The current result is what
we want so just remove the redundant one.

Lib/php/php.swg

@@ -219,7 +219,6 @@
               unsigned long,
               signed char,
               unsigned char,
-              bool,
               size_t
 %{
   RETVAL_LONG($1);