sm8250-common: overlay: Enable smooth display with 120Hz

There's no point to keep using custom pref to set minimum refresh rate
when AOSP smooth display feature behaves in the exact same way in
our case.

Change-Id: I497918a9c9687443a9438fb6291769f6e51d9379

overlay-lineage/packages/apps/Settings/res/values/config.xml

@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2007 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.
--->
-
-<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
-    <!-- Whether to show min refresh rate in display settings -->
-    <bool name="config_show_min_refresh_rate_switch">true</bool>
-</resources>