chore: remove unreachable functions

internal/db/helpers.go

@@ -1,11 +1,6 @@
 package db
 
-import (
-	"context"
-	"database/sql"
-	"errors"
-	"fmt"
-)
+import "database/sql"
 
 // NullStringOr returns n.String if valid and non-empty, otherwise fallback
 func NullStringOr(n sql.NullString, fallback string) string {
@@ -24,16 +19,3 @@ func (r GetUserWatchListRow) DisplayTitle() string {
 	return DisplayTitle(r.TitleEnglish, r.TitleJapanese, r.TitleOriginal)
 }
 
-// BeginTx starts a transaction and returns the Queries wrapper bound to it
-func BeginTx(ctx context.Context, db *sql.DB) (*Queries, *sql.Tx, error) {
-	if db == nil {
-		return nil, nil, errors.New("database unavailable")
-	}
-
-	tx, err := db.BeginTx(ctx, nil)
-	if err != nil {
-		return nil, nil, fmt.Errorf("failed to begin transaction: %w", err)
-	}
-
-	return New(tx), tx, nil
-}

internal/db/sqlite.go

@@ -4,7 +4,6 @@ import (
 	"database/sql"
 	"fmt"
 	"os"
-	"path/filepath"
 
 	_ "github.com/mattn/go-sqlite3"
 )
@@ -26,19 +25,3 @@ func GetDBFile() string {
 	return "mal.db"
 }
 
-// GetMigrationsDir returns the migrations directory, checking MIGRATIONS_DIR env var first
-func GetMigrationsDir() (string, error) {
-	if dir := os.Getenv("MIGRATIONS_DIR"); dir != "" {
-		return dir, nil
-	}
-	wd, err := os.Getwd()
-	if err != nil {
-		return "", fmt.Errorf("failed to get working directory: %w", err)
-	}
-	return filepath.Join(wd, "migrations"), nil
-}
-
-// Init opens the database and returns a Queries instance
-func Init(db *sql.DB) (*Queries, error) {
-	return New(db), nil
-}