chore(build): remove deprecated jenkins deploy script

Nightlies and windows releases are now done through CircleCi and travis
Branches "for-jenkins-release" and "for-jekins-testing" will be removed
when this is merged.

.travis/deploy-jenkins-branch.sh

@@ -1,37 +0,0 @@
-#!/bin/bash
-#
-#    Copyright © 2016-2019 by The qTox Project Contributors
-#
-#    This program is libre software: you can redistribute it and/or modify
-#    it under the terms of the GNU General Public License as published by
-#    the Free Software Foundation, either version 3 of the License, or
-#    (at your option) any later version.
-#
-#    This program is distributed in the hope that it will be useful,
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#    GNU General Public License for more details.
-#
-#    You should have received a copy of the GNU General Public License
-#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-
-# push latest tag to the `for-jenkins-release` branch to trigger a windows
-# release build
-# 
-# should be run only when a new tag is pushed
-
-set -eu -o pipefail
-
-main() {
-    # can already be cloned by the `build-gitstats` job
-    if [[ ! -e qTox ]]
-    then
-        git clone https://github.com/qTox/qTox.git qTox
-    fi
-
-    cd qTox
-    git checkout "$TRAVIS_BRANCH" -b for-jenkins-release
-    git push --force "https://${GH_DEPLOY_JENKINS}@github.com/qTox/qTox.git"
-}
-main