Remove unused parameter displayId

The parameter is not currently used in InputDispatcher.

Test: presubmit
Bug: none
Change-Id: I61f9e6566e4fe77318814e56e73b7f3470fa6a04
diff --git a/services/inputflinger/InputManager.cpp b/services/inputflinger/InputManager.cpp
index 7d30672..e7640dd 100644
--- a/services/inputflinger/InputManager.cpp
+++ b/services/inputflinger/InputManager.cpp
@@ -128,7 +128,7 @@
                 "from non shell/root entity (PID: %d)", ipc->getCallingPid());
         return;
     }
-    mDispatcher->registerInputChannel(channel, false);
+    mDispatcher->registerInputChannel(channel);
 }
 
 void InputManager::unregisterInputChannel(const sp<InputChannel>& channel) {