Remove BUCK files

Summary: We won't use them so this is just dead weight that's going to break at some point.

Reviewed By: jknoxville

Differential Revision: D19470548

fbshipit-source-id: 3def22e6f5db2923d5551d7b6a3472cb4364186c

react-native/ReactNativeFlipperExample/android/app/_BUCK

@@ -1,55 +0,0 @@
-# To learn about Buck see [Docs](https://buckbuild.com/).
-# To run your application with Buck:
-# - install Buck
-# - `npm start` - to start the packager
-# - `cd android`
-# - `keytool -genkey -v -keystore keystores/debug.keystore -storepass android -alias androiddebugkey -keypass android -dname "CN=Android Debug,O=Android,C=US"`
-# - `./gradlew :app:copyDownloadableDepsToLibs` - make all Gradle compile dependencies available to Buck
-# - `buck install -r android/app` - compile, install and run application
-#
-
-load(":build_defs.bzl", "create_aar_targets", "create_jar_targets")
-
-lib_deps = []
-
-create_aar_targets(glob(["libs/*.aar"]))
-
-create_jar_targets(glob(["libs/*.jar"]))
-
-android_library(
-    name = "all-libs",
-    exported_deps = lib_deps,
-)
-
-android_library(
-    name = "app-code",
-    srcs = glob([
-        "src/main/java/**/*.java",
-    ]),
-    deps = [
-        ":all-libs",
-        ":build_config",
-        ":res",
-    ],
-)
-
-android_build_config(
-    name = "build_config",
-    package = "com.reactnativeflipperexample",
-)
-
-android_resource(
-    name = "res",
-    package = "com.reactnativeflipperexample",
-    res = "src/main/res",
-)
-
-android_binary(
-    name = "app",
-    keystore = "//android/keystores:debug",
-    manifest = "src/main/AndroidManifest.xml",
-    package_type = "debug",
-    deps = [
-        ":app-code",
-    ],
-)