remove travis from required checks for merging PRs (#386)

diff --git a/.asf.yaml b/.asf.yaml
index f18f9f6..a43b62a 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -31,8 +31,6 @@
     master:
       required_status_checks:
         strict: false
-        contexts:
-          - "Travis CI - Pull Request"
       required_pull_request_reviews:
         required_appoving_review_count: 1
       required_signatures: false