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 2be4e77..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 build/reports/rat/rat-report.txt