[GTK] [2.42.5] LowLevelInterpreter.cpp:339:21: error: ‘t6’ was not de…

…clared in this scope

https://bugs.webkit.org/show_bug.cgi?id=268739

Unreviewed build fix. Seems a backport went badly, and we didn't notice
because the code is architecture-specific.

* Source/JavaScriptCore/llint/LowLevelInterpreter.cpp:
(JSC::CLoop::execute):

Source/JavaScriptCore/llint/LowLevelInterpreter.cpp

@@ -336,8 +336,6 @@ JSValue CLoop::execute(OpcodeID entryOpcodeID, void* executableAddress, VM* vm,
     UNUSED_VARIABLE(t2);
     UNUSED_VARIABLE(t3);
     UNUSED_VARIABLE(t5);
-    UNUSED_VARIABLE(t6);
-    UNUSED_VARIABLE(t7);
 
     struct StackPointerScope {
         StackPointerScope(CLoopStack& stack)