removing a git submodule binding properly w/o deleting files https://stackoverflow.com/questions/1260748/how-do-i-remove-a-submodule

git-submodule-rm

#!/bin/bash

mv $1 $1_tmp

git submodule deinit -f -- $1
rm -rf .git/modules/$1
git rm -f $1
# Note: a/submodule (no trailing slash)

# or, if you want to leave it in your working tree and have done step 0
git rm --cached $1
mv $1_tmp $1