Remove git hooks when disabled in blt.yml

[mortona42]

I disabled the commit-msg hook in blt.yml. I think this should remove the hook when blt:init:git-hooks is run.

blt.yml:

git:
  default_branch: master
  remotes: {  }
  hooks:
    commit-msg: false

When I run this command:

blt big

I get the following output:

Installing pre-commit git hook...
Skipping installation of commit-msg git hook

And I expected this to happen:
Remove the hook if it was installed previously.