fix(travis): clean-up unusable push to github.io repo for prs

.travis.yml

@@ -44,23 +44,11 @@ addons:
 # working copy to be there for updating already.
 before_install:
   - |
-    if [ -n "$GH_APIDOC_TOKEN" ]; then
+    if [ -n "$GH_APIDOC_TOKEN" ] && [ "$TRAVIS_PULL_REQUEST" = "false" ] ; then
       set -e
       git clone \
         https://${GH_APIDOC_TOKEN}@github.com/awesomeWM/awesomeWM.github.io \
         "$BUILD_WEB" 2>&1 | sed "s/$GH_APIDOC_TOKEN/GH_APIDOC_TOKEN/g"
-      if [ "$TRAVIS_PULL_REQUEST" = false ]; then
-        branch="$TRAVIS_BRANCH"
-      else
-        branch="pr-$TRAVIS_PULL_REQUEST"
-      fi
-      if [ "$branch" != master ]; then
-        cd $BUILD_WEB
-        if ! git checkout -b "$branch" "origin/$branch"; then
-          git checkout -b "$branch"
-        fi
-        cd -
-      fi
     fi
 
 install:
@@ -87,8 +75,7 @@ script:
 
 after_success:
   - |
-    if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then exit 0; fi
-    if [ -n "$GH_APIDOC_TOKEN" ]; then
+    if [ -n "$GH_APIDOC_TOKEN" ] && [ "$TRAVIS_PULL_REQUEST" = "false" ] ; then
       set -e
       commit_hash=$(git rev-parse --short HEAD)
       cd $BUILD_WEB