delete lua-mode
Squashed 'packages/lua-mode/' content from commit 9d86a22

git-subtree-dir: packages/lua-mode
git-subtree-split: 9d86a227d1072b801cb14358b92ead853757180d
Merge commit '907e7a3715da4571934ec5d0820ce2d6066b4023' as 'packages/lua-mode'
lua mode lua-imenu-generic-expression add support for local function