Get rid of TravisCI

.travis.yml

@@ -1,32 +0,0 @@
-language: c++
-
-os:
-  - linux
-  - osx
-
-dist: focal
-osx_image: xcode12.5
-
-cache:
-  directories:
-    - $HOME/Library/Caches/Homebrew
-
-before_cache:
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew cleanup; fi
-
-addons:
-  homebrew:
-    packages:
-    - qt
-  apt:
-    packages:
-    - qtbase5-dev
-    - qtbase5-private-dev
-    - libqt5opengl5-dev
-    - qttools5-dev-tools
-
-script:
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then PATH=/usr/local/opt/qt/bin/:${PATH}; fi
-  - lrelease gpxsee.pro
-  - qmake gpxsee.pro
-  - make