Revert "InputMapper refactor: Configure empty InputDevice"

Revert submission 23779328

Reason for revert: Found touch issues on devices in latest qpr-build 

Reverted changes: /q/submissionid:23779328

Change-Id: If3cfc122d571198c8c93c0c5438f70037f8e677e
diff --git a/services/inputflinger/tests/InstrumentedInputReader.h b/services/inputflinger/tests/InstrumentedInputReader.h
index e6bf3f9..7f8d556 100644
--- a/services/inputflinger/tests/InstrumentedInputReader.h
+++ b/services/inputflinger/tests/InstrumentedInputReader.h
@@ -44,7 +44,7 @@
 
 protected:
     virtual std::shared_ptr<InputDevice> createDeviceLocked(
-            nsecs_t when, int32_t eventHubId, const InputDeviceIdentifier& identifier);
+            int32_t eventHubId, const InputDeviceIdentifier& identifier);
 
     class FakeInputReaderContext : public ContextImpl {
     public: