Delete Navigation Bar for the Theme Editor

This has been unused since the removal of the Theme Editor from Android
Studio.

Bug: N/A
Test: N/A
Change-Id: Ia39a35b73d8f763d99b9010a8150113992918d38
(cherry picked from commit 62dbe4016285b0c4b3b92f5ebfcb7edd7a6eb8eb)
diff --git a/bridge/src/com/android/layoutlib/bridge/bars/ThemePreviewNavigationBar.java b/bridge/src/com/android/layoutlib/bridge/bars/ThemePreviewNavigationBar.java
deleted file mode 100644
index 523f140..0000000
--- a/bridge/src/com/android/layoutlib/bridge/bars/ThemePreviewNavigationBar.java
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.layoutlib.bridge.bars;
-
-import com.android.layoutlib.bridge.android.BridgeContext;
-import com.android.resources.Density;
-
-import android.content.Context;
-import android.content.pm.ApplicationInfo;
-import android.util.AttributeSet;
-import android.view.View;
-import android.widget.LinearLayout;
-
-/**
- * Navigation Bar for the Theme Editor preview.
- *
- * For small bars, it is identical to {@link NavigationBar}.
- * But wide bars from {@link NavigationBar} are too wide for the Theme Editor preview.
- * To solve that problem, {@link ThemePreviewNavigationBar} use the layout for small bars,
- * and have no padding on the sides. That way, they have a similar look as the true ones,
- * and they fit in the Theme Editor preview.
- */
-public class ThemePreviewNavigationBar extends NavigationBar {
-    private static final int PADDING_WIDTH_SW600 = 0;
-
-    @SuppressWarnings("unused")
-    public ThemePreviewNavigationBar(Context context, AttributeSet attrs) {
-        super((BridgeContext) context,
-                Density.getEnum(((BridgeContext) context).getMetrics().densityDpi),
-                LinearLayout.HORIZONTAL, // In this mode, it doesn't need to be render vertically
-                ((BridgeContext) context).getConfiguration().getLayoutDirection() ==
-                        View.LAYOUT_DIRECTION_RTL,
-                (context.getApplicationInfo().flags & ApplicationInfo.FLAG_SUPPORTS_RTL) != 0,
-                0, LAYOUT_XML, false);
-    }
-
-    @Override
-    protected int getSidePadding(float sw) {
-        if (sw >= 600) {
-            return PADDING_WIDTH_SW600;
-        }
-        return super.getSidePadding(sw);
-    }
-}