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 beb47cd..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-# Test format changes to this .travis.yml file before submitting a PR with:
-# http://lint.travis-ci.org/openMF/Fineract-CN-mobile
-
-language: android
-jdk: oraclejdk8
-# Turn off caching to avoid any caching problems
-cache: false
-sudo: required
-env:
-  global:
-    - ANDROID_API_LEVEL=28
-    - ANDROID_BUILD_TOOLS_VERSION=28.0.3
-    - ADB_INSTALL_TIMEOUT=20 # minutes (2 minutes by default)
-
-android:
-  components:
-    - platform-tools
-    - tools
-    - build-tools-$ANDROID_BUILD_TOOLS_VERSION
-    - android-$ANDROID_API_LEVEL
-    # Google Play Services
-    - extra-google-google_play_services
-    # Support library
-    - extra-android-support
-    # Latest artifacts in local repository
-    - extra-google-m2repository
-    - extra-android-m2repository
-
-script: "./gradlew build --stacktrace"
\ No newline at end of file