Update builds

* Add Go 1.17.6 to the build versions
* Remove Go 1.14
* Remove unused TravisCI file

Author: bsoubachov

.github/workflows/main.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go_version: ["1.16.5", "1.15.13", "1.14.15"]
+        go_version: ["1.17.6", "1.16.5", "1.15.13"]
     steps:
       - uses: actions/checkout@v2
       - name: Setup Go