README.md: remove Travis CI badge [ci skip]

README.md

@@ -8,7 +8,6 @@ GDAL - Geospatial Data Abstraction Library
 [![Build Status](https://github.com/OSGeo/gdal/actions/workflows/clang_static_analyzer.yml/badge.svg)](https://github.com/osgeo/gdal/actions?query=workflow%3A%22CLang+Static+Analyzer%22+branch%3Amaster)
 [![Build Status](https://github.com/OSGeo/gdal/actions/workflows/code_checks.yml/badge.svg)](https://github.com/osgeo/gdal/actions?query=workflow%3A%22Code+Checks%22+branch%3Amaster)
 [![Build Status](https://github.com/OSGeo/gdal/actions/workflows/conda.yml/badge.svg)](https://github.com/osgeo/gdal/actions?query=workflow%3A%22Conda%22+branch%3Amaster)
-[![Build Status](https://app.travis-ci.com/OSGeo/gdal.svg?branch=master)](https://app.travis-ci.com/OSGeo/gdal)
 [![Build Status](https://scan.coverity.com/projects/749/badge.svg?flat=1)](https://scan.coverity.com/projects/gdal)
 [![Documentation build Status](https://github.com/OSGeo/gdal/workflows/Docs/badge.svg)](https://github.com/osgeo/gdal/actions?query=workflow%3A%22Docs%22+branch%3Amaster)
 [![Fuzzing Status](https://oss-fuzz-build-logs.storage.googleapis.com/badges/gdal.svg)](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:gdal)