Delete unused script

Signed-off-by: David Julia <djulia@pivotal.io>
fix typo’d git command in promote_and_publish

  + Run bash script with debug output

Signed-off-by: David Julia <djulia@pivotal.io>
Disable strict host key checking for github.com in pipeline docker image

Signed-off-by: Chelsea Troy <ctroy@pivotal.io>