Delete .travis.yml

Removing Travis CI as ASF Infra has decided to move away from Travis.
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 7a6f3fe..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,33 +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
-sudo: false
-jdk:
-- openjdk8
-install: true
-script: "./travis.sh"
-env:
-  global:
-    - BUILD_SNAPSHOTS_BRANCH=develop
-    - ARTIFACTORY_URL=https://mifos.jfrog.io/mifos
-    - ARTIFACTORY_USER=travis-ci
-    - secure: "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"
-after_failure:
-  - ./gradlew rat
-  - cat api/build/reports/rat/rat-report.txt