Don't need travis workaround anymore

Author: JakeGinnivan

.travis.yml

@@ -8,8 +8,6 @@ os:
 before_install:
   - git fetch --unshallow # Travis always does a shallow clone, but GitVersion needs the full history including branches and tags
 script:
-  - export PR=https://api.github.com/repos/$TRAVIS_REPO_SLUG/pulls/$TRAVIS_PULL_REQUEST
-  - export BRANCH=$(if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then echo $TRAVIS_BRANCH; else echo `curl -s $PR | jq -r .head.ref`; fi)
   - ./build.sh
 cache:
   directories: