Revert "Fix drag and drop (2/3)"

This reverts commit fbe5d9c4233dcd802a122f70ca5a3641fcd556ca.

Bug: 137819199
Test: manual
Change-Id: I7afec569519b9c69eb03225672db6db141b20241
Merged-In: I7afec569519b9c69eb03225672db6db141b20241
(cherry picked from commit 6cbb97591535868d629a562dfd7d8e24865cf551)
diff --git a/include/input/IInputFlinger.h b/include/input/IInputFlinger.h
index 4365a3c..d23e3b7 100644
--- a/include/input/IInputFlinger.h
+++ b/include/input/IInputFlinger.h
@@ -37,7 +37,6 @@
 
     virtual void setInputWindows(const std::vector<InputWindowInfo>& inputHandles,
             const sp<ISetInputWindowsListener>& setInputWindowsListener) = 0;
-    virtual void transferTouchFocus(const sp<IBinder>& fromToken, const sp<IBinder>& toToken) = 0;
     virtual void registerInputChannel(const sp<InputChannel>& channel) = 0;
     virtual void unregisterInputChannel(const sp<InputChannel>& channel) = 0;
 };
@@ -51,8 +50,7 @@
     enum {
         SET_INPUT_WINDOWS_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION,
         REGISTER_INPUT_CHANNEL_TRANSACTION,
-        UNREGISTER_INPUT_CHANNEL_TRANSACTION,
-        TRANSFER_TOUCH_FOCUS
+        UNREGISTER_INPUT_CHANNEL_TRANSACTION
     };
 
     virtual status_t onTransact(uint32_t code, const Parcel& data,