gradle: remove unused buck configuration

Signed-off-by: Jakub Sokołowski <jakub@status.im>

android/app/BUCK

@@ -1,53 +0,0 @@
-import re
-
-# 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`
-# - `cp ~/.android/debug.keystore keystores/debug.keystore`
-# - `./gradlew :app:copyDownloadableDepsToLibs` - make all Gradle compile dependencies available to Buck
-# - `buck install -r android/app` - compile, install and run application
-#
-
-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 = 'im.status.ethereum',
-)
-
-android_resource(
-  name = 'res',
-  res = 'src/main/res',
-  package = 'im.status.ethereum',
-)
-
-android_binary(
-  name = 'app',
-  package_type = 'debug',
-  manifest = 'src/main/AndroidManifest.xml',
-  keystore = '//android/keystores:debug',
-  deps = [
-    ':app-code',
-  ],
-)

android/app/build.gradle

@@ -313,36 +313,4 @@ dependencies {
     implementation 'com.facebook.fresco:animated-gif:2.0.0'
 }
 
-def getLocalNDKDir = { ->
-    def rootDir = project.rootDir
-    def localProperties = new File(rootDir, "local.properties")
-    if (!localProperties.exists()) {
-        return null
-    }
-    Properties properties = new Properties()
-    localProperties.withInputStream { instr ->
-        properties.load(instr)
-    }
-    return properties.getProperty('ndk.dir')
-}
-
-// Run this once to be able to run the application with BUCK
-// puts all compile dependencies into folder libs for BUCK to use
-task hemroidBuild(type: Exec) {
-    def localNdkDir = getLocalNDKDir()
-    def ndkDir = System.env.ANDROID_NDK
-    if (localNdkDir != null) {
-        ndkDir = localNdkDir 
-    }
-
-    def execPath = "$ndkDir/ndk-build"
-    def exec = new File(execPath)
-    if (!exec.exists()) {
-        throw new GradleException("No ndk-build binary found!")
-    }
-    executable execPath
-}
-
-preBuild.dependsOn hemroidBuild
-
 apply from: file("../../node_modules/@react-native-community/cli-platform-android/native_modules.gradle"); applyNativeModulesAppBuildGradle(project)