Removed repeated block of code

Author: kmvanbrunt

cmd2/cmd2.py

@@ -3894,13 +3894,6 @@ def cmdloop(self, intro: Optional[str] = None) -> None:
             if callargs:
                 self.cmdqueue.extend(callargs)
 
-        # Only the main thread is allowed to set a new signal handler in Python, so only attempt if that is the case
-        if threading.current_thread() is threading.main_thread():
-            # Register a SIGINT signal handler for Ctrl+C
-            import signal
-            original_sigint_handler = signal.getsignal(signal.SIGINT)
-            signal.signal(signal.SIGINT, self.sigint_handler)
-
         # Grab terminal lock before the prompt has been drawn by readline
         self.terminal_lock.acquire()