移除 buck 配置

example/.buckconfig

-
-[android]
-  target = Google Inc.:Google APIs:23
-
-[maven_repositories]
-  central = https://repo1.maven.org/maven2

example/android/keystores/BUCK

-keystore(
-    name = "debug",
-    properties = "debug.keystore.properties",
-    store = "debug.keystore",
-    visibility = [
-        "PUBLIC",
-    ],
-)

example/android/keystores/debug.keystore.properties

-key.store=debug.keystore
-key.alias=androiddebugkey
-key.store.password=android
-key.alias.password=android