feat: drop the throwaway migration harness that a blanket git add swept into the placement commit, since it only existed to apply migrations against a scratch database while verifying the branch

internal/infrastructure/db/zz_tmp_test.go

@@ -1,38 +0,0 @@
-package db
-
-import (
-	"errors"
-	"os"
-	"testing"
-
-	"github.com/golang-migrate/migrate/v4"
-	"github.com/golang-migrate/migrate/v4/source/iofs"
-)
-
-func inst(t *testing.T) *migrate.Migrate {
-	dsn := os.Getenv("MIG_DSN")
-	if dsn == "" {
-		t.Skip("no dsn")
-	}
-	src, _ := iofs.New(migrationsFS, "migrations")
-	m, err := migrate.NewWithSourceInstance("iofs", src, dsn)
-	if err != nil {
-		t.Fatal(err)
-	}
-	return m
-}
-
-func TestTmpUpDown(t *testing.T) {
-	m := inst(t)
-	defer m.Close()
-	if err := m.Up(); err != nil && !errors.Is(err, migrate.ErrNoChange) {
-		t.Fatal("up:", err)
-	}
-	// Both new migrations must round-trip.
-	if err := m.Steps(-2); err != nil {
-		t.Fatal("down 2:", err)
-	}
-	if err := m.Steps(2); err != nil {
-		t.Fatal("re-up 2:", err)
-	}
-}