cmd/mim-{daq,rpi}: apply golanci fixes

cmd/mim-daq/main.go

@@ -73,7 +73,9 @@ func newShell(cfg config.RunCtl, rc *tdaq.RunControl) *liner.State {
 			select {
 			case <-quit:
 			default:
-				go rc.Do(ctx, tdaq.CmdQuit)
+				go func() {
+					_ = rc.Do(ctx, tdaq.CmdQuit)
+				}()
 			}
 		}()
 

cmd/mim-rpi/main.go

@@ -116,6 +116,4 @@ func (dev *rpi) run(ctx tdaq.Context) error {
 		}
 		time.Sleep(100 * time.Millisecond)
 	}
-
-	return nil
 }