remove spell check or md stage from travis (#233)

Author: mnoman09

.travis.yml

@@ -21,17 +21,7 @@ jobs:
         - find . -type f -name '*.md' -exec awesome_bot {} \;
       notifications:
         email: false
-#    - stage: 'Lint markdown files'
-#      os: linux
-#      language: generic
-#      before_install: skip
-#      install:
-#        - npm i -g markdown-spellcheck
-#      before_script:
-#        - wget --quiet https://raw.githubusercontent.com/optimizely/mdspell-config/master/.spelling
-#      script:
-#        - mdspell -a -n -r --en-us '**/*.md'
-#      after_success: skip
+
     - stage: 'Integration tests'
       env: SDK=csharp SDK_BRANCH=$TRAVIS_PULL_REQUEST_BRANCH
       cache: false