chore(release): simplify scripts so that they can be tested locally

The `git fetch --all` resulted in an error if in the local `.gitconfig`
a remote was configured that does not exist in the bower/code.anguarjs.org
repositories (e.g. "remote "upstream-prs"").

scripts/code.angularjs.org/publish.sh

@@ -38,12 +38,6 @@ function prepare {
   #
   echo "-- Updating code.angularjs.org"
   mkdir $REPO_DIR/$NEW_VERSION
-  cd $REPO_DIR
-  git reset --hard HEAD
-  git checkout master
-  git fetch --all
-  git reset --hard origin/master
-  cd $SCRIPT_DIR
   cp -r $BUILD_DIR/* $REPO_DIR/$NEW_VERSION/
 
   #