Remove Travis-CI.org config

Travis-CI.org shutdown building projects. Alternatives are either using
Travis-CI.com or using GitHub Actions which is better integrated and
more clear that it's free for all repositories.

.travis.yml

@@ -1,17 +0,0 @@
-language: c
-
-compiler:
-  - clang
-  - gcc
-
-before_install:
-  - sudo -s tools/travis_update_packages
-
-script:
-  - cmake -DWITH_QSTAT=/usr/bin/quakestat -DCMAKE_C_FLAGS=-Werror .
-  - make
-
-notifications:
-  irc: "chat.freenode.net#xqf"
-  on_success: change
-  on_failure: always

tools/travis_update_packages

@@ -1,48 +0,0 @@
-#! /bin/sh
-
-# Author: Thomas Debesse
-# License: ISC
-
-# please run this script as root user
-# please use tabs for indentation (heredocs starting with <<-EOF need tabs)
-
-echo 'Updating package list'
-apt-get update -qq
-
-# ubuntu trusty dependencies
-echo 'Installing qstat, intltool, cmake, libgtk2.0-dev, libgeoip-dev dependencies'
-apt-get install -q -y qstat intltool cmake libgtk2.0-dev libgeoip-dev
-
-# libminizip-dev is not in trusty
-# building xqf requires gettext 0.19 or later for 'msgfmt --desktop'
-
-# if release is older than xenial (16.04)
-if [ "$(lsb_release -sr | cut -c1-2)" -lt '16' ]
-then
-	echo 'Adding xenial respository'
-	<<-EOF cat >> '/etc/apt/sources.list.d/ubuntu-xenial-main.list'
-	deb http://archive.ubuntu.com/ubuntu xenial main universe
-	EOF
-
-	echo 'Pin xenial repository to disable package installation from this repository by default'
-	<<-EOF cat > '/etc/apt/preferences.d/xenial-pinning'
-	Package: *
-	Pin: release n=xenial
-	Pin-Priority: -100
-	EOF
-
-	echo 'Adding the xenial repository key'
-	apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 3B4FE6ACC0B21F32
-
-	echo 'Updating package list'
-	apt-get update -qq
-
-	echo 'Installing libminizip-dev gettext dependencies from xenial repository'
-	# updated gettext requires libgomp1 gcc-5-base
-	apt-get install -y -q -t xenial libminizip-dev gettext libgomp1 gcc-5-base
-else
-	echo 'Installing libminizip-dev dependency'
-	apt-get install -q -y libminizip-dev
-fi
-
-#EOF