zend_types: Remove deprecated Z_OPT_IMMUTABLE() and Z_IMMUTABLE()

Author: TimWolla

UPGRADING.INTERNALS

@@ -100,6 +100,9 @@ PHP 8.6 INTERNALS UPGRADE NOTES
     offsetof() directly.
   . The deprecated Z_COPYABLE(), Z_COPYABLE_P(), Z_OPT_COPYABLE(), and
     Z_OPT_COPYABLE_P() macros have been removed. Check for IS_ARRAY directly.
+  . The deprecated Z_IMMUTABLE(), Z_IMMUTABLE_P(), Z_OPT_IMMUTABLE(), and
+    Z_OPT_IMMUTABLE_P() macros have been removed. Check for
+    IS_ARRAY && !REFCOUNTED directly.
 
 ========================
 2. Build system changes

Zend/zend_types.h

@@ -944,12 +944,6 @@ static zend_always_inline uint32_t zval_gc_info(uint32_t gc_type_info) {
 #define Z_COLLECTABLE(zval)			((Z_TYPE_FLAGS(zval) & IS_TYPE_COLLECTABLE) != 0)
 #define Z_COLLECTABLE_P(zval_p)		Z_COLLECTABLE(*(zval_p))
 
-/* deprecated: (IMMUTABLE is the same as IS_ARRAY && !REFCOUNTED) */
-#define Z_IMMUTABLE(zval)			(Z_TYPE_INFO(zval) == IS_ARRAY)
-#define Z_IMMUTABLE_P(zval_p)		Z_IMMUTABLE(*(zval_p))
-#define Z_OPT_IMMUTABLE(zval)		Z_IMMUTABLE(zval_p)
-#define Z_OPT_IMMUTABLE_P(zval_p)	Z_IMMUTABLE(*(zval_p))
-
 /* the following Z_OPT_* macros make better code when Z_TYPE_INFO accessed before */
 #define Z_OPT_TYPE(zval)			(Z_TYPE_INFO(zval) & Z_TYPE_MASK)
 #define Z_OPT_TYPE_P(zval_p)		Z_OPT_TYPE(*(zval_p))