delete 'templates-sdk-dev', all these files were merged
back into 'templates-sdk' with this CL:
https://googleplex-android-review.git.corp.google.com/#/c/1394582/
and this depends on the following CL to update all the doc build targets:
https://googleplex-android-review.git.corp.google.com/#/c/1406302/

Change-Id: Id38134e1d35c5235bb66241c50945b55ac9de1dd
217 files changed