Cleaning up some build configurations

> Removing Launcher3Go-without-quickstep
> Removing src_ui_overrides to src_no_quickstep
> Removing unnecessary code swpa for GO builds

Bug: 330920490
Flag: None
Test: Presubmit, everything builds
Change-Id: I5746dbc7c5a37c1d99d78b55bf2a6adce1a711c9

src_no_quickstep/com/android/launcher3/uioverrides/flags/DeveloperOptionsUI.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2023 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.launcher3.uioverrides.flags;
+
+import androidx.preference.PreferenceCategory;
+import androidx.preference.PreferenceFragmentCompat;
+
+/**
+ * Place holder class for developer options.
+ */
+public class DeveloperOptionsUI {
+
+    public DeveloperOptionsUI(PreferenceFragmentCompat fragment, PreferenceCategory flags) { }
+}