[Remoting Android] Remove old renderer code

remoting/android/java/src/org/chromium/chromoting/PaintEventParameter.java

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.chromoting;
-
-import android.graphics.Canvas;
-import android.graphics.Point;
-
-/** The parameter for an OnPaint event. */
-public final class PaintEventParameter {
-    public final Point cursorPosition;
-    public final Canvas canvas;
-    public final float scale;
-
-    public PaintEventParameter(Point cursorPosition, Canvas canvas, float scale) {
-        this.cursorPosition = cursorPosition;
-        this.canvas = canvas;
-        this.scale = scale;
-    }
-}