Drop duplicate getInstance call

Bug: 205676419
Test: make
Change-Id: I33797fd81b7539ba56e8355f602d894fa68f3e29

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

@@ -5706,7 +5706,7 @@ public class InputMethodManagerService extends IInputMethodManager.Stub
         final PrintWriter pw = shellCommand.getOutPrintWriter();
         switch (cmd) {
             case "start":
-                ImeTracing.getInstance().getInstance().startTrace(pw);
+                ImeTracing.getInstance().startTrace(pw);
                 break;  // proceed to the next step to update the IME client processes.
             case "stop":
                 ImeTracing.getInstance().stopTrace(pw);