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 758a6f7..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