update go version and remove patch (#100)

* Update main.yml

* Update go.mod

.github/workflows/main.yml

@@ -19,12 +19,6 @@ jobs:
       with:
         go-version-file: 'go.mod'
 
-    - name: Patch Go use 600296
-      #https://go-review.googlesource.com/c/go/+/600296
-      run: |
-       cd "$(go env GOROOT)"
-       curl "https://go-review.googlesource.com/changes/go~600296/revisions/5/patch" | base64 -d | patch --verbose -p 1
-
     - name: Install gomobile
       run: |
         go install golang.org/x/mobile/cmd/gomobile@latest