Tidy the github repo (#25)

* Removes unused github actions and workflows
* Updates the issue template to use annotaterb instead of annotate

Author: drwl

.github/ISSUE_TEMPLATE.md

@@ -8,6 +8,6 @@ $ show your commands here.
 
 ## Version
 
-- annotate version
+- annotaterb version
 - rails version
 - ruby version