Do not add Meta's license header to template (#37513)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/37513

After the monorepo migration, we started to add license headers to the template file.
This needs to be reverted, I'm doing it here.

Changelog:
[Internal] [Changed] - Do not add Meta's license header to template

Reviewed By: dmytrorykun

Differential Revision: D46070682

fbshipit-source-id: ee071d90c92e32c57698b09298a2f5cf39d3f6d7

packages/react-native/template/android/app/build.gradle

@@ -1,10 +1,3 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
 apply plugin: "com.android.application"
 apply plugin: "org.jetbrains.kotlin.android"
 apply plugin: "com.facebook.react"

packages/react-native/template/android/app/src/debug/java/com/helloworld/ReactNativeFlipper.kt

@@ -1,10 +1,3 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
 package com.helloworld
 
 import android.content.Context

packages/react-native/template/android/app/src/main/java/com/helloworld/MainActivity.kt

@@ -1,10 +1,3 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
 package com.helloworld
 
 import com.facebook.react.ReactActivity

packages/react-native/template/android/app/src/main/java/com/helloworld/MainApplication.kt

@@ -1,10 +1,3 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
 package com.helloworld
 
 import android.app.Application

packages/react-native/template/android/app/src/release/java/com/helloworld/ReactNativeFlipper.kt

@@ -1,10 +1,3 @@
-/*
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
 package com.helloworld
 
 import android.content.Context