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 bde3672..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