Remove unnecessary migration steps

Author: naveensingh

app/src/main/kotlin/com/simplemobiletools/musicplayer/databases/SongsDatabase.kt

@@ -10,7 +10,7 @@ import com.simplemobiletools.musicplayer.interfaces.*
 import com.simplemobiletools.musicplayer.models.*
 import com.simplemobiletools.musicplayer.objects.MyExecutor
 
-@Database(entities = [Track::class, Playlist::class, QueueItem::class, Artist::class, Album::class], version = 13)
+@Database(entities = [Track::class, Playlist::class, QueueItem::class, Artist::class, Album::class], version = 12)
 abstract class SongsDatabase : RoomDatabase() {
 
     abstract fun SongsDao(): SongsDao
@@ -43,7 +43,6 @@ abstract class SongsDatabase : RoomDatabase() {
                             .addMigrations(MIGRATION_9_10)
                             .addMigrations(MIGRATION_10_11)
                             .addMigrations(MIGRATION_11_12)
-                            .addMigrations(MIGRATION_12_13)
                             .build()
                     }
                 }
@@ -181,14 +180,10 @@ abstract class SongsDatabase : RoomDatabase() {
                     execSQL("DROP TABLE artists")
                     execSQL("ALTER TABLE artists_new RENAME TO artists")
                     execSQL("CREATE UNIQUE INDEX IF NOT EXISTS `index_artists_id` ON `artists` (`id`)")
-                }
-            }
-        }
 
-        private val MIGRATION_12_13 = object: Migration(12, 13) {
-            override fun migrate(database: SupportSQLiteDatabase) {
-                database.execSQL("ALTER TABLE tracks ADD COLUMN date_added INTEGER NOT NULL DEFAULT 0")
-                database.execSQL("ALTER TABLE albums ADD COLUMN date_added INTEGER NOT NULL DEFAULT 0")
+                    database.execSQL("ALTER TABLE tracks ADD COLUMN date_added INTEGER NOT NULL DEFAULT 0")
+                    database.execSQL("ALTER TABLE albums ADD COLUMN date_added INTEGER NOT NULL DEFAULT 0")
+                }
             }
         }
     }