Remove plugin source, moved to rojo-plugin

.travis.yml

@@ -1,26 +1,5 @@
-language: python
+language: rust
 
-env:
-  - RUST="stable" LUA="lua=5.1"
-  - RUST="beta" LUA="lua=5.1"
-
-before_install:
-  - pip install hererocks
-  - hererocks lua_install -r^ --$LUA
-  - curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain $RUST
-  - export PATH=$PATH:$PWD/lua_install/bin:$HOME/.cargo/bin
-
-install:
-  - luarocks install luafilesystem
-  - luarocks install busted
-  - luarocks install luacov
-  - luarocks install luacov-coveralls
-  - luarocks install luacheck
-
-script:
-  - cd plugin && luacheck . && cd ..
-  - lua -lluacov spec.lua
-  - cargo test --verbose
-
-after_success:
-  - luacov-coveralls -e $TRAVIS_BUILD_DIR/lua_install
+rust:
+  - stable
+  - beta