Remove -race from windows units temporarily on V7 side.

Because of golang/go#27089, passing "-race" to
ginkgo causes the windows build to fail. We are simply removing this
flag until the golang issue is resolved. (Units on other operating
systems still check for race conditions.)

This change is to parallel fe63a26.

[#160911621]

ci/cli-v7/tasks/units-windows.bat

@@ -12,4 +12,4 @@ go get -u github.com/onsi/ginkgo/ginkgo
 
 ginkgo version
 
-ginkgo -r -race -randomizeAllSpecs -randomizeSuites -skipPackage integration -flakeAttempts=2 .
+ginkgo -r -randomizeAllSpecs -randomizeSuites -skipPackage integration -flakeAttempts=2 .