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 43e7ce7..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