Merge pull request OSGeo#3744 from mwtoews/travis-ci-doc-build

CI: Clean-up Travis CI scripts and files related to publishing docs

Author: rouault

.travis.yml

@@ -14,15 +14,6 @@ matrix:
   fast_finish: true
   include:
 
-    - os: linux
-      dist: xenial
-      compiler: gcc
-      services:
-        - docker
-      env:
-        - BUILD_NAME=publish_doc
-        - DETAILS="publish_doc"
-
     - os: linux
       dist: bionic
       compiler: gcc
@@ -50,8 +41,6 @@ install: ./travis/${BUILD_NAME}/install.sh
 script:
   - echo "done"
 
-after_success: ./travis/${BUILD_NAME}/after_success.sh
-
 notifications:
   irc:
     channels: