ci: Drop obsolete Travis configs

.travis.yml

@@ -1,54 +0,0 @@
-language: erlang
-
-env:
-  global:
-    - LUAROCKS_BASE=luarocks-2.0.13
-  matrix:
-    - LUA=lua5.1 LUA_DEV=liblua5.1-dev LUA_VER=5.1 LUA_SFX=5.1 LUA_INCDIR=/usr/include/lua5.1
-    - LUA=lua5.2 LUA_DEV=liblua5.2-dev LUA_VER=5.2 LUA_SFX=5.2 LUA_INCDIR=/usr/include/lua5.2
-    - LUA=luajit LUA_DEV=libluajit-5.1-dev LUA_VER=5.1 LUA_SFX=jit LUA_INCDIR=/usr/include/luajit-2.0
-
-branches:
-  only:
-    - master
-
-before_install:
-  - if [ $LUA = "luajit" ]; then
-      sudo add-apt-repository ppa:mwild1/ppa -y && sudo apt-get update -y;
-    fi
-  - sudo apt-get install $LUA
-  - sudo apt-get install $LUA_DEV
-  - lua$LUA_SFX -v
-  # Install a recent luarocks release
-  - wget http://luarocks.org/releases/$LUAROCKS_BASE.tar.gz
-  - tar zxvpf $LUAROCKS_BASE.tar.gz
-  - cd $LUAROCKS_BASE
-  - ./configure
-    --lua-version=$LUA_VER --lua-suffix=$LUA_SFX --with-lua-include="$LUA_INCDIR"
-  - sudo make
-  - sudo make install
-  - cd $TRAVIS_BUILD_DIR
-
-
-install:
-  - export DEBUG=DEBUG
-  - sudo -E luarocks make luasocket-scm-0.rockspec 
-
-script: 
-  - cd test
-  - lua$LUA_SFX hello.lua
-  - lua$LUA_SFX testsrvr.lua > /dev/null &
-  - lua$LUA_SFX testclnt.lua
-  - lua$LUA_SFX stufftest.lua
-  - lua$LUA_SFX excepttest.lua
-  - lua$LUA_SFX test_bind.lua
-  - lua$LUA_SFX test_getaddrinfo.lua
-  - lua$LUA_SFX ltn12test.lua
-  - lua$LUA_SFX mimetest.lua
-  - lua$LUA_SFX urltest.lua
-  - lua$LUA_SFX test_socket_error.lua
-
-notifications:
-  email:
-    on_success: change
-    on_failure: always