application: remove unused button handling

application.c

@@ -328,15 +328,6 @@ void main(void)
 				terminal_send(c); // send received character to terminal
 			}
 		}
-		while (button_flag) { // user pressed button
-			action = true; // action has been performed
-			printf("button pressed\n");
-			led_toggle(); // toggle LED
-			for (uint32_t i=0; i<1000000; i++) { // wait a bit to remove noise and double trigger
-				__asm__("nop");
-			}
-			button_flag = false; // reset flag
-		}
 		if (action) { // go to sleep if nothing had to be done, else recheck for activity
 			action = false;
 		} else {