Remove dummy `github helper` command.
Remove dummy `github helper` command.

My guess is this command was used for testing the helpers. With RSpec, this is unnecessary

reenhanced/github-gem,kohsuke/github-gem,thetaxman/github-gem,peterkinalex/github-gem,jarib/github-gem,Wirachmat/github-gem,rlqualls/github-gem,supriyantomaftuh/github-gem,defunkt/github-gem,DarcRanger/github-gem,dustin/github-gem