removing RxJava1.x stuff from update_docs.sh script

Author: pwittchen

update_docs.sh

@@ -1,6 +1,5 @@
 #!/usr/bin/env bash
 git checkout gh-pages
-git show RxJava1.x:README.md >docs/RxJava1.x/README.md
 git show RxJava2.x:README.md >docs/RxJava2.x/README.md
 git add -A
 git commit -m "updating docs"