Remove MAP_JIT flag

This flag is supposed to go on the flags parameter, rather than prot. Moreover,
this flag is no longer needed because the JIT does not set RWX without ZTS, and
JIT+ZTS has been disabled on macOS with Apple Silicon.

Closes GH-13638

Author: iluuu1994

ext/opcache/shared_alloc_mmap.c

@@ -180,9 +180,6 @@ static int create_segments(size_t requested_size, zend_shared_segment ***shared_
 #ifdef PROT_MAX
 	flags |= PROT_MAX(PROT_READ | PROT_WRITE | PROT_EXEC);
 #endif
-#ifdef MAP_JIT
-	flags |= MAP_JIT;
-#endif
 #if (defined(__linux__) || defined(__FreeBSD__)) && (defined(__x86_64__) || defined (__aarch64__)) && !defined(__SANITIZE_ADDRESS__)
 	void *hint = find_prefered_mmap_base(requested_size);
 	if (hint != MAP_FAILED) {