MFH: fix typo and bug #43646

Zend/tests/bug30922.phpt

@@ -10,4 +10,4 @@ var_dump($a instanceOf A);
 echo "ok\n";
 ?>
 --EXPECTF--
-Fatal error: Interface RecurisiveFooFar cannot not implement itself in %sbug30922.php on line %d
+Fatal error: Interface RecurisiveFooFar cannot implement itself in %sbug30922.php on line %d

Zend/zend_compile.c

@@ -2508,7 +2508,7 @@ static inline void do_implement_interface(zend_class_entry *ce, zend_class_entry
 		zend_error(E_CORE_ERROR, "Class %s could not implement interface %s", ce->name, iface->name);
 	}
 	if (ce == iface) {
-		zend_error(E_ERROR, "Interface %s cannot not implement itself", ce->name);
+		zend_error(E_ERROR, "Interface %s cannot implement itself", ce->name);
 	}
 }