chore: cleanup - rm unused files (Movies App) (#36913)

Summary:
The example **Movies App** *no longer exists*, no wonder; why no one noticed these files ;).
It makes sense to remove all files specifically related to it.
This diff removes such dir and files.

## Changelog:

[GENERAL][REMOVED] - Cleanup - remove  unused files (Movies App)

Pull Request resolved: https://github.com/facebook/react-native/pull/36913

Test Plan: - `yarn test-ci` --> should be green.

Reviewed By: christophpurrer

Differential Revision: D45056787

Pulled By: cortinico

fbshipit-source-id: 56b8d39772c70d31f2ba65ad986477710fa9fa9d

.circleci/Dockerfiles/Dockerfile.android

@@ -30,7 +30,6 @@ ADD packages/react-native/Libraries /app/packages/react-native/Libraries
 ADD packages/react-native/ReactAndroid /app/packages/react-native/ReactAndroid
 ADD packages/react-native/ReactCommon /app/packages/react-native/ReactCommon
 ADD packages/react-native/React /app/packages/react-native/React
-ADD keystores /app/keystores
 ADD packages/react-native-codegen /app/packages/react-native-codegen
 ADD tools /app/tools
 ADD scripts /app/scripts

keystores/BUCK

@@ -1,10 +0,0 @@
-load("//tools/build_defs:fb_native_wrapper.bzl", "fb_native")
-
-fb_native.keystore(
-    name = "debug",
-    properties = "debug.keystore.properties",
-    store = "debug.keystore",
-    visibility = [
-        "PUBLIC",
-    ],
-)

keystores/debug.keystore.properties

@@ -1,4 +0,0 @@
-key.store=debug.keystore
-key.alias=androiddebugkey
-key.store.password=android
-key.alias.password=android