TASK: Remove submodule file that should not exist
TASK: Remove submodule file that should not exist

This was added during reverting some unhappy change and should not be
here at all.

aertmann/flow-development-collection,daniellienert/flow-development-collection,albe/flow-development-collection,fcool/flow-development-collection,aertmann/flow-development-collection,robertlemke/flow-development-collection,daniellienert/flow-development-collection,robertlemke/flow-development-collection,bwaidelich/flow-development-collection,albe/flow-development-collection,neos/flow-development-collection,kdambekalns/flow-development-collection,dlubitz/flow-development-collection,daniellienert/flow-development-collection,bwaidelich/flow-development-collection,neos/flow-development-collection,neos/flow-development-collection,fcool/flow-development-collection,kdambekalns/flow-development-collection,dlubitz/flow-development-collection,robertlemke/flow-development-collection,kdambekalns/flow-development-collection,fcool/flow-development-collection,bwaidelich/flow-development-collection,fcool/flow-development-collection,robertlemke/flow-development-collection,kdambekalns/flow-development-collection,neos/flow-development-collection,dlubitz/flow-development-collection,albe/flow-development-collection,aertmann/flow-development-collection