Fix mlkit build KI and remove deprecated on-device samples (along with

LiveCamera handling). On device models have been moved to another SDK.

Change-Id: I6d1a04ea5aa5bea333bd248eeb5e6d6619666914

Author: gkaldev

mlkit-langid/.gitignore

@@ -1,51 +1 @@
 UPDATE: On June 3, 2020, we started offering ML Kit's on-device APIs through a new standalone SDK. Cloud APIs, AutoML Vision Edge, and custom model deployment will continue to be available via Firebase Machine Learning. [Learn more](https://developers.google.com/ml-kit)
-
-ML Kit Language ID for Firebase Quickstart
-==============================
-
-The ML Kit LanguageID for Firebase Android Quickstart app demonstrates how to
-use the Language ID feature of ML Kit to to identify the language
-of text in your application.
-
-Introduction
-------------
-
-- [Read more about ML Kit LanguageID for Firebase](https://firebase.google.com/docs/ml-kit/android/identify-languages)
-
-Getting Started
----------------
-
-- [Add Firebase to your Android Project](https://firebase.google.com/docs/android/setup).
-- Run the sample on an Android device.
-- Choose the Java or Kotlin version on the initial screen.
-- Type input text and press the buttons to identify languages.
-
-Result
------------
-<img src="app/src/screen.png" height="534" width="300"/>
-
-Support
--------
-
-- [Stack Overflow](https://stackoverflow.com/questions/tagged/firebase-mlkit)
-- [Firebase Support](https://firebase.google.com/support/).
-
-License
--------
-
-Copyright 2019 Google, Inc.
-
-Licensed to the Apache Software Foundation (ASF) under one or more contributor
-license agreements.  See the NOTICE file distributed with this work for
-additional information regarding copyright ownership.  The ASF licenses this
-file to you 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.