fix(deisctl): omit cache from `deisctl uninstall platform"

Author: mboersma

deisctl/cmd/cmd.go

@@ -510,7 +510,7 @@ func uninstallAllServices(b backend.Backend, wg *sync.WaitGroup, outchan chan st
 	wg.Wait()
 
 	outchan <- fmt.Sprintf("Control plane...")
-	b.Destroy([]string{"controller", "builder", "cache", "database", "registry@*"}, wg, outchan, errchan)
+	b.Destroy([]string{"controller", "builder", "database", "registry@*"}, wg, outchan, errchan)
 	wg.Wait()
 
 	outchan <- fmt.Sprintf("Logging subsystem...")