remove vendor from some tooling

.circleci/config.yml

@@ -14,7 +14,6 @@ executors:
       GOPROXY: https://proxy.golang.org/
       TEST_RESULTS_DIR: &TEST_RESULTS_DIR /tmp/test-results
       ARTIFACTS_DIR: &ARTIFACTS_DIR /tmp/artifacts
-      GOFLAGS: "-mod=vendor"
 
 jobs:
   go-checks:

Makefile

@@ -5,7 +5,7 @@ VERSION?="0.3.44"
 # source files, except the protobuf stubs which are built instead with
 # "make protobuf".
 generate:
-	GOFLAGS=-mod=vendor go generate ./...
+	go generate ./...
 	# go fmt doesn't support -mod=vendor but it still wants to populate the
 	# module cache with everything in go.mod even though formatting requires
 	# no dependencies, and so we're disabling modules mode for this right

e2e/e2e.go

@@ -265,7 +265,6 @@ func GoBuild(pkgPath, tmpPrefix string) string {
 
 	cmd := exec.Command(
 		"go", "build",
-		"-mod=vendor",
 		"-o", tmpFilename,
 		pkgPath,
 	)