Merge pull request #5046 from spiffxp/use-go1.15

Update to go1.15, fix local make verify

Author: k8s-ci-robot

go.mod

@@ -1,6 +1,6 @@
 module k8s.io/community
 
-go 1.12
+go 1.15
 
 require (
 	github.com/client9/misspell v0.3.4

hack/verify-generated-docs.sh

@@ -21,7 +21,6 @@ set -o pipefail
 CRT_DIR=$(pwd)
 VERIFY_TEMP=$(mktemp -d 2>/dev/null || mktemp -d -t k8s-community.XXXXXX)
 WORKING_DIR="${VERIFY_TEMP}/src/testgendocs"
-GOPATH="${VERIFY_TEMP}"
 mkdir -p "${WORKING_DIR}"
 
 function cleanup {