Update README

- Remove references to buck build which is no longer supported
- Change the clone URL from github to googlesource
- Remove --recursive from clone command; there are no submodules

Change-Id: I13e941785825d753533a090342fe276cf2435709
diff --git a/README.md b/README.md
index ebc8d43..adafb42 100644
--- a/README.md
+++ b/README.md
@@ -27,29 +27,20 @@
 Build
 -----
 
-The plugin can be bulit with Buck and Bazel. To build the plugin with Buck,
-install [Buck](http://facebook.github.io/buck/setup/install.html) and run
-the following:
-
-```
-  git clone --recursive https://github.com/davido/gerrit-oauth-provider.git
-  cd gerrit-oauth-provider && buck build plugin
-```
-
 To build the plugin with Bazel, install
 [Bazel](https://bazel.build/versions/master/docs/install.html) and run the
 following:
 
 ```
-  bazel build oauth
+  git clone https://gerrit.googlesource.com/plugins/oauth
+  cd oauth && bazel build oauth
 ```
 
 Install
 -------
 
-Copy the `buck-out/gen/gerrit-oauth-provider.jar` wenn built with Buck or
-`bazel-genfiles/gerrit-oauth-provider.jar` wenn built with Bazel to
-`$gerit_site/plugins` and re-run init to configure it:
+Copy the `bazel-genfiles/gerrit-oauth-provider.jar` to
+`$gerrit_site/plugins` and re-run init to configure it:
 
 ```
   java -jar gerrit.war init -d <site>