Revert "run vint on travis ci"

This reverts commit e3cc2f8.

Author: tyru

.travis.yml

@@ -26,7 +26,6 @@ jobs:
       - MAKE_TARGET="clean_compiled check checkpy js/test py/test test/node_position/test_position.out"
       - TEST_PROFILE=vim-profile-installed.txt
       - TEST_PYTHON=python3
-      - RUN_VINT=true
 
 install:
   - |
@@ -37,15 +36,12 @@ install:
       export PATH=$HOME/vim/bin:$PATH
     fi
   - pip install covimerage --user
-  - if [ "$RUN_VINT" = "true" ]; then pip install --user --upgrade vim-vint pathlib enum34 typing; fi
 
 script:
   - uname -a
   - which -a vim
   - vim --cmd version --cmd quit
   - make --keep-going $MAKE_TARGET
-  - if [ "$RUN_VINT" = "true" ]; then python --version; fi
-  - if [ "$RUN_VINT" = "true" ]; then vint autoload; fi
 
 after_success:
   - covimerage write_coverage $TEST_PROFILE