Removing interface to Travis CI

Patch by Bret McGuire; reviewed by Andy Tolbert and Bret McGuire
reference: https://github.com/apache/cassandra-java-driver/pull/2066
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 84d40ce..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-# 
-#   http://www.apache.org/licenses/LICENSE-2.0
-# 
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied.  See the License for the
-# specific language governing permissions and limitations
-# under the License.
-
-language: java
-dist: trusty
-sudo: false
-# see https://sormuras.github.io/blog/2018-03-20-jdk-matrix.html
-matrix:
-  include:
-    # 8
-    - env: JDK='OpenJDK 8'
-      jdk: openjdk8
-    # 11
-    - env: JDK='OpenJDK 11'
-      # switch to JDK 11 before running tests
-      before_script: . $TRAVIS_BUILD_DIR/ci/install-jdk.sh -F 11 -L GPL
-before_install:
-  # Require JDK8 for compiling
-  - jdk_switcher use openjdk8
-  - ./install-snapshots.sh
-install: mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V
-script: mvn test -Djacoco.skip=true -Dmaven.test.failure.ignore=true -Dmaven.javadoc.skip=true -B -V
-cache:
-  directories:
-    - $HOME/.m2