Deleting the .git folder may cause problems in your git repository. If you want to delete all your commit history but keep the code in its current state, it is very safe to do it as in the following:

1. Checkout
   git checkout --orphan latest_branch
2. Add all the files
   git add -A
3. Commit the changes
   git commit -am "commit message"
4. Delete the branch
   git branch -D master
5. Rename the current branch to master
   git branch -m master
6. Finally, force update your repository
   git push -f origin master

Hope this helps. this will not keep your old commit history around :)