Clean up more old plugin gunk

.travis.yml

@@ -1,34 +1,5 @@
 matrix:
   include:
-    # Lua tests are currently disabled because of holes in Lemur that are pretty
-    # tedious to fix. It should be fixed by either adding missing features to
-    # Lemur or by migrating to a CI system based on real Roblox instead.
-
-    # - language: python
-    #   env:
-    #     - LUA="lua=5.1"
-
-    #   before_install:
-    #     - pip install hererocks
-    #     - hererocks lua_install -r^ --$LUA
-    #     - export PATH=$PATH:$PWD/lua_install/bin
-
-    #   install:
-    #     - luarocks install luafilesystem
-    #     - luarocks install busted
-    #     - luarocks install luacov
-    #     - luarocks install luacov-coveralls
-    #     - luarocks install luacheck
-
-    #   script:
-    #     - cd plugin
-    #     - luacheck src
-    #     - lua -lluacov spec.lua
-
-    #   after_success:
-    #     - cd plugin
-    #     - luacov-coveralls -e $TRAVIS_BUILD_DIR/lua_install
-
     - language: rust
       rust: 1.34.0
       cache: cargo