Remove travis

.travis.yml

@@ -1,21 +0,0 @@
----
-
-language: go
-sudo: false
-dist: trusty
-
-go:
-  - 1.15.x
-  - 1.14.x
-  - 1.13.x
-  - master
-
-before_script: make prepare
-
-script:
-  - make all
-  - make lint
-
-matrix:
-  allow_failures:
-    - go: master