Delete .travis.yml

updating to remove travis; will plan to circle back and add support for github actions
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 0dfdf99..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,17 +0,0 @@
-language: dart
-
-dart:
-  - dev
-
-addons:
-  chrome: stable
-
-services:
-  - xvfb
-
-script: ./tool/travis.sh
-
-# Only building master means that we don't run two builds for each pull request.
-branches:
-  only:
-    - master