Fixs #1738

Unability to generate an app-specific controller

php bin/console make:controller test -iapi

[critical] Error thrown while running command "make:controller test -iapi". Message: "The "-a" option does not exist."

php bin/console make:controller test -i -iapi

[critical] Error thrown while running command "make:controller test -i -iapi". Message: "The "-a" option does not exist."

I think we are better off without this short param