Removing the old subrepos from this repo

This repo uses subrepos, but they were added with an old version of the
command. I could scrub them from the history, but that would mess up
upstream. Instead just deleting them, then I'll subrepo clone them
again.
subrepo clone: git@github.com:ingydotnet/test-more-bash.git (master) -> ext/test-more-bash/

  subdir: ext/test-more-bash
  remote: git@github.com:ingydotnet/test-more-bash.git
  branch: master
  commit: cb27f05

git-subrepo version: 0.1.0
Merge subrepo commit 'ffd790e'
Update status/license/notes in doc
subrepo clone: git@github.com:ingydotnet/bashplus.git (master) -> ext/bashplus/

  subdir: ext/bashplus
  remote: git@github.com:ingydotnet/bashplus.git
  branch: master
  commit: 6f15ca5

git-subrepo version: 0.1.0
Merge subrepo commit 'd395023'