Moved backtrace to ArmInterface

src/core/hle/kernel/thread.h

@@ -240,11 +240,6 @@ public:
         return status == ThreadStatus::WaitSynchAll;
     }
 
-    /**
-     * Logs the backtrace for the current thread
-     */
-    void LogBacktrace();
-
     ThreadContext& GetContext() {
         return context;
     }