[skip ci] Remove unreachable code after zend_error_noreturn calls (GH-21122)

Zend/zend_ast.c

@@ -1153,7 +1153,6 @@ static zend_result ZEND_FASTCALL zend_ast_evaluate_inner(
 			if (args->children != 1 || args->child[0]->attr != ZEND_PLACEHOLDER_VARIADIC) {
 				/* TODO: PFAs */
 				zend_error_noreturn(E_COMPILE_ERROR, "Constant expression contains invalid operations");
-				return FAILURE;
 			}
 
 			switch (ast->kind) {

Zend/zend_inheritance.c

@@ -2263,7 +2263,6 @@ static void zend_do_implement_interfaces(zend_class_entry *ce, zend_class_entry
 		if (UNEXPECTED(!(iface->ce_flags & ZEND_ACC_INTERFACE))) {
 			efree(interfaces);
 			zend_error_noreturn(E_ERROR, "%s cannot implement %s - it is not an interface", ZSTR_VAL(ce->name), ZSTR_VAL(iface->name));
-			return;
 		}
 		for (uint32_t j = 0; j < num_interfaces; j++) {
 			if (interfaces[j] == iface) {

ext/zend_test/test.c

@@ -493,7 +493,6 @@ static ZEND_FUNCTION(zend_call_method)
 		ce = zend_lookup_class(Z_STR_P(class_or_object));
 		if (!ce) {
 			zend_error_noreturn(E_ERROR, "Unknown class '%s'", Z_STRVAL_P(class_or_object));
-			return;
 		}
 	} else {
 		zend_argument_type_error(1, "must be of type object|string, %s given", zend_zval_value_name(class_or_object));