Delete .travis.yml

No more Travis CI :(

.travis.yml

@@ -1,26 +0,0 @@
-language: python
-sudo: false
-
-env:
-  - LUA="luajit=2.0"
-
-before_install:
-  - pip install hererocks
-  - hererocks lua_install -r^ --$LUA
-  - export PATH=$PATH:$PWD/lua_install/bin
-
-install:
-  - luarocks install luacheck
-  - luarocks install busted
-  - luarocks install luacov
-  - luarocks install luacov-coveralls
-  - luarocks install middleclass
-  - wget https://raw.githubusercontent.com/bartbes/slither/b9cf6daa1e8995093aa80a40ee9ff98402eeb602/slither.lua
-  - wget https://raw.githubusercontent.com/vrld/hump/038bc9025f1cb850355f4b073357b087b8122da9/class.lua
-
-script:
-  - luacheck --std max+busted bitser.lua spec --globals love --no-max-line-length
-  - busted --verbose --coverage
-
-after_success:
-  - luacov-coveralls --include bitser -e $TRAVIS_BUILD_DIR/lua_install