Remove Travis instructions [ci skip]

travis.org stopped working properly a long time ago

README.md

@@ -167,55 +167,6 @@ So, on `linuxdeployqt` call: `linuxdeployqt [...] -qtlibinfix "Custom" [...]`.
 
 If you don't mention this infix, `linuxdeployqt` won't be able to detect Qt Core and Widgets libraries.
 
-## Using linuxdeployqt with Travis CI
-
-A common use case for `linuxdeployqt` is to use it on Travis CI after the `make` command. The following example illustrates how to use `linuxdeployqt` with Travis CI. Create a `.travis.yml` file similar to this one (be sure to customize it, e.g., change `APPNAME` to the name of your application as it is spelled in the `Name=` entry of the `.desktop` file):
-
-```
-language: cpp
-compiler: gcc
-sudo: require
-dist: trusty
-
-before_install:
-  - sudo add-apt-repository ppa:beineri/opt-qt-5.10.1-trusty -y
-  - sudo apt-get update -qq
-
-install:
-  - sudo apt-get -y install qt510base libgl1-mesa-dev
-  - source /opt/qt*/bin/qt*-env.sh
-
-script:
-  - qmake CONFIG+=release PREFIX=/usr
-  - make -j$(nproc)
-  - make INSTALL_ROOT=appdir -j$(nproc) install ; find appdir/
-  - wget -c -nv "https://github.com/probonopd/linuxdeployqt/releases/download/continuous/linuxdeployqt-continuous-x86_64.AppImage"
-  - chmod a+x linuxdeployqt-continuous-x86_64.AppImage
-  # export VERSION=... # linuxdeployqt uses this for naming the file
-  - ./linuxdeployqt-continuous-x86_64.AppImage appdir/usr/share/applications/*.desktop -appimage
-
-after_success:
-  # find appdir -executable -type f -exec ldd {} \; | grep " => /usr" | cut -d " " -f 2-3 | sort | uniq # for debugging
-  # curl --upload-file APPNAME*.AppImage https://transfer.sh/APPNAME-git.$(git rev-parse --short HEAD)-x86_64.AppImage
-  - wget -c https://github.com/probonopd/uploadtool/raw/master/upload.sh
-  - bash upload.sh APPNAME*.AppImage*
-  
-branches:
-  except:
-    - # Do not build tags that we create when we upload to GitHub Releases
-    - /^(?i:continuous)/
-```
-
-When you save your change, then Travis CI should build and upload an AppImage for you. More likely than not, some fine-tuning will still be required.
-
-For this to work, you need to set up `GITHUB_TOKEN` in Travis CI; please see https://github.com/probonopd/uploadtool.
-
-By default, qmake `.pro` files generated by Qt Creator unfortunately don't support `make install` out of the box. In this case you will get
-
-```
-make: Nothing to be done for `install'.
-find: `appdir/': No such file or directory
-```
 ### Fix for "make: Nothing to be done for 'install'"
 
 If `qmake` does not allow for `make install` or does not install the desktop file and icon, then you need to change your `.pro` file it similar to https://github.com/probonopd/FeedTheMonkey/blob/master/FeedTheMonkey.pro.