Remove unmaintained travis file

.travis.yml

@@ -1,63 +0,0 @@
-# Copyright 2016, 2017 Peter Dimov
-# Distributed under the Boost Software License, Version 1.0.
-# (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
-
-language: cpp
-
-sudo: false
-
-python: "2.7"
-
-branches:
-  only:
-    - master
-    - develop
-    - /feature\/.*/
-
-env:
-  matrix:
-    - BOGUS_JOB=true
-
-matrix:
-
-  exclude:
-    - env: BOGUS_JOB=true
-
-  include:
-    - os: linux
-      compiler: g++
-      env: TOOLSET=gcc CXXSTD=03,11
-
-    - os: linux
-      compiler: clang++
-      env: TOOLSET=clang CXXSTD=03,11,14,1z
-      addons:
-        apt:
-          packages:
-            - libstdc++-4.9-dev
-          sources:
-            - ubuntu-toolchain-r-test
-
-    - os: osx
-      compiler: clang++
-      env: TOOLSET=clang CXXSTD=03,11,14,1z
-
-install:
-  - BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
-  - cd ..
-  - git clone -b $BOOST_BRANCH https://github.com/boostorg/boost.git boost-root
-  - cd boost-root
-  - git submodule update --init tools/build
-  - git submodule update --init libs/config
-  - git submodule update --init tools/boostdep
-  - cp -r $TRAVIS_BUILD_DIR/* libs/container
-  - python tools/boostdep/depinst/depinst.py container
-  - ./bootstrap.sh
-  - ./b2 headers
-
-script:
-  - ./b2 libs/container/test toolset=$TOOLSET cxxstd=$CXXSTD
-
-notifications:
-  email:
-    on_success: always