Remove unused codes for IMMS

These unused codes was added by CL[1] and CL[2]
and didn't use now. We should able to safely
remove them.

[1]: I4dc9d6513d0559156f7da39244f3fc5ebc952ed4
[2]: I7df18b095d33ecafffced75aba9e4f4693b0c393

Bug: 236920321
Test: presubmit
Change-Id: I044f409aa521b77f5689b8650785211becc2f450

services/core/java/com/android/server/inputmethod/InputMethodManagerService.java

@@ -173,7 +173,6 @@ import com.android.internal.inputmethod.StartInputReason;
 import com.android.internal.inputmethod.UnbindReason;
 import com.android.internal.messages.nano.SystemMessageProto.SystemMessage;
 import com.android.internal.notification.SystemNotificationChannels;
-import com.android.internal.os.SomeArgs;
 import com.android.internal.os.TransferPipe;
 import com.android.internal.util.ConcurrentUtils;
 import com.android.internal.util.DumpUtils;
@@ -3429,7 +3428,6 @@ public final class InputMethodManagerService extends IInputMethodManager.Stub
     @Override
     public void reportPerceptibleAsync(IBinder windowToken, boolean perceptible) {
         Objects.requireNonNull(windowToken, "windowToken must not be null");
-        int uid = Binder.getCallingUid();
         synchronized (ImfLock.class) {
             if (!calledFromValidUserLocked()) {
                 return;
@@ -4711,7 +4709,6 @@ public final class InputMethodManagerService extends IInputMethodManager.Stub
     @UiThread
     @Override
     public boolean handleMessage(Message msg) {
-        SomeArgs args;
         switch (msg.what) {
             case MSG_SHOW_IM_SUBTYPE_PICKER:
                 final boolean showAuxSubtypes;