Merge pull request #663 from ava-labs/lint

Remove extra runs of installing linter

Author: StephenButtolph

.ci/lint.sh

@@ -1,9 +1,6 @@
 # binary will be $(go env GOPATH)/bin/golangci-lint
 curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.30.0
-# or install it into ./bin/
-curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s v1.30.0
-# In alpine linux (as it does not come with curl by default)
-wget -O- -nv https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s v1.30.0
+
 golangci-lint --version