Remove Travis CI configuration
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index f5b756c..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,59 +0,0 @@
-dist: trusty
-sudo: false
-language: java
-env:
-   global:
-    - MAVEN_OPTS="-Dformatter.skip=true -Dsurefire.useFile=false -Dmaven.artifact.threads=128 -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn"
-before_cache:
-  - rm -Rf $HOME/.m2/repository/org/apache/winegrower
-cache:
-  timeout: 1000
-  directories:
-  - "$HOME/.m2"
-
-install: echo true
-
-jobs:
-  include:
-    # PR profile
-    - stage: pullrequest_build
-      script: mvn clean install -B
-      jdk: oraclejdk8
-
-    # master profile
-    - stage: master_build
-      env:
-      - STEP=Build Oracle 8 JVM
-      script: mvn clean install -B
-      jdk: oraclejdk8
-
-    - stage: master_build
-      env:
-      - STEP=Build OpenJDK 8 JVM
-      script: mvn clean install -B
-      jdk: openjdk8
-
-    - stage: master_build
-      env:
-      - STEP=Build OpenJDK 11 JVM
-      script: mvn clean install -B
-      jdk: openjdk11
-
-    - stage: master_build
-      env:
-      - STEP=Update Documentation
-      script: cd winegrower-documentation && mvn pre-site -Pgh-pages --settings ../.travis/settings.xml
-      jdk: oraclejdk8
-
-    - stage: master_build
-      env:
-      - STEP=Sonatype Audit
-      script: travis_wait 50 mvn install -DskipTests -B ossindex:audit
-      jdk: oraclejdk8
-
-stages:
-  - name: master_build
-    if: branch = master AND type != pull_request
-  - name: pullrequest_build
-    if: type = pull_request
-