update .travis.yml conf

.travis.yml

@@ -6,23 +6,14 @@ dist: trusty
 os:
   - linux
 env:
-  global:
-    - CMAKE_URL=https://cmake.org/files/v3.11/cmake-3.11.1-Linux-x86_64.tar.gz
 addons:
   apt:
-    sources:
-      - llvm-toolchain-trusty-6.0
-      - ubuntu-toolchain-r-test
     packages:
       - git
       - python
       - python-pip
       - python2.7-dev
       - libc6-i386
-      - clang-6.0
-      - libclang-6.0
-      - llvm-6.0
-      - llvm-6.0-dev
       - curl
 
 compiler:
@@ -31,24 +22,7 @@ compiler:
 before_install:
   - sudo pip install -U virtualenv pre-commit pip
   # Download and install recent cmake
-  - |
-    if [[ ${TRAVIS_OS_NAME} == "linux" ]]; then
-      CMAKE_URL=${CMAKE_URL}
-      mkdir -p ${DEPS_DIR}/cmake
-      travis_retry wget --no-check-certificate --quiet -O - ${CMAKE_URL} | tar --strip-components=1 -xz -C ${DEPS_DIR}/cmake
-      export PATH=${DEPS_DIR}/cmake/bin:${PATH}
-    fi
-
-#install:
-#  - if [ "$CXX" = "g++" ]; then export CXX="g++-5" CC="gcc-5"; fi
-#  - if [ "$CXX" = "clang++" ]; then export CXX="clang++-6.0" CC="clang-6.0"; fi
 
-before_script:
-  - |
-    echo "cmake generate compile_commands.json for clang-tidy"
-    ls -l -a
-    clang-tidy -version 
-    clang-format -version
 script:
   - | 
     function timeout() { perl -e 'alarm shift; exec @ARGV' "$@"; }