Remove zend_set_memory_limit_ex() API

This was added temporarily for the PHP-8.0 branch to avoid an
ABI break.

Zend/zend_alloc.c

@@ -2658,7 +2658,7 @@ ZEND_API char* ZEND_FASTCALL zend_strndup(const char *s, size_t length)
 	return p;
 }
 
-ZEND_API zend_result zend_set_memory_limit_ex(size_t memory_limit)
+ZEND_API zend_result zend_set_memory_limit(size_t memory_limit)
 {
 #if ZEND_MM_LIMIT
 	if (memory_limit < ZEND_MM_CHUNK_SIZE) {
@@ -2672,13 +2672,6 @@ ZEND_API zend_result zend_set_memory_limit_ex(size_t memory_limit)
 	return SUCCESS;
 }
 
-ZEND_API void zend_set_memory_limit(size_t memory_limit)
-{
-#if ZEND_MM_LIMIT
-	AG(mm_heap)->limit = memory_limit >= ZEND_MM_CHUNK_SIZE ? memory_limit : ZEND_MM_CHUNK_SIZE;
-#endif
-}
-
 ZEND_API size_t zend_memory_usage(bool real_usage)
 {
 #if ZEND_MM_STAT

Zend/zend_alloc.h

@@ -219,8 +219,7 @@ ZEND_API void * __zend_realloc(void *p, size_t len) ZEND_ATTRIBUTE_ALLOC_SIZE(2)
 #define perealloc2_recoverable_rel(ptr, size, copy_size, persistent) ((persistent)?realloc((ptr), (size)):erealloc2_recoverable_rel((ptr), (size), (copy_size)))
 #define pestrdup_rel(s, persistent) ((persistent)?strdup(s):estrdup_rel(s))
 
-ZEND_API void zend_set_memory_limit(size_t memory_limit);
-ZEND_API zend_result zend_set_memory_limit_ex(size_t memory_limit);
+ZEND_API zend_result zend_set_memory_limit(size_t memory_limit);
 
 ZEND_API void start_memory_manager(void);
 ZEND_API void shutdown_memory_manager(bool silent, bool full_shutdown);

main/main.c

@@ -272,7 +272,7 @@ static PHP_INI_MH(OnChangeMemoryLimit)
 	} else {
 		value = Z_L(1)<<30;		/* effectively, no limit */
 	}
-	if (zend_set_memory_limit_ex(value) == FAILURE) {
+	if (zend_set_memory_limit(value) == FAILURE) {
 		zend_error(E_WARNING, "Failed to set memory limit to %zd bytes (Current memory usage is %zd bytes)", value, zend_memory_usage(true));
 		return FAILURE;
 	}