fix: import path should be github.com/ooni/probe-cli/v3 (#200)

See https://github.com/ooni/probe/issues/1335#issuecomment-771499511

internal/cli/show/show.go

@@ -1,28 +0,0 @@
-package nettest
-
-import (
-	"github.com/alecthomas/kingpin"
-	"github.com/apex/log"
-	"github.com/ooni/probe-cli/internal/cli/root"
-	"github.com/ooni/probe-cli/internal/database"
-	"github.com/ooni/probe-cli/internal/output"
-)
-
-func init() {
-	cmd := root.Command("show", "Show a specific measurement")
-	msmtID := cmd.Arg("id", "the id of the measurement to show").Required().Int64()
-	cmd.Action(func(_ *kingpin.ParseContext) error {
-		ctx, err := root.Init()
-		if err != nil {
-			log.WithError(err).Error("failed to initialize root context")
-			return err
-		}
-		msmt, err := database.GetMeasurementJSON(ctx.DB(), *msmtID)
-		if err != nil {
-			log.Errorf("error: %v", err)
-			return err
-		}
-		output.MeasurementJSON(msmt)
-		return nil
-	})
-}