error Class "DBmanager" is never used،Should I uninstall and install Android Studio?

Question

My friends, I made a class called dbmanger and this is my database class and inside the class there is a databasehelper. But for me it shows these two errors

Class "DtaBaseHelper" is never used 
Class "DBmanager" is never usedcode 
Property "context" is never used

code database:

class DBmanager(private val context: Context )
{
private val dbName="notesDB"
    private val tableName="tblNotes"
    private val colID="ID"
    private val colTitle="Title"
    private val colDesc="Desc"
    private val dbVersion=1
    private val sqlCreateTable="CREATE TABLE IF NOT EXISTS "+tableName+"("+colID+" INTEGER PRIMARY KEY ,"+colTitle+" VARCHAR ,"+colDesc+" text );"
   // private val db = DataBA
    inner class DtaBaseHelper(private val context2: Context):SQLiteOpenHelper(context2,dbName,null,dbVersion) {
        override fun onCreate(p0: SQLiteDatabase?) {
            p0?.execSQL(sqlCreateTable)
            Toast.makeText(context2, "دیتــا بیس ایجاد شد ", Toast.LENGTH_SHORT).show()
        }

        override fun onUpgrade(p0: SQLiteDatabase?, p1: Int, p2: Int) {
            if (p0 != null) {
                p0.execSQL("DROP TABLE IF EXISTS $tableName")
            }
        }
    }


}

I haven't written any code in the main activity yet

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Guys, what do you think, should I delete Android Studio and install another version? I'm tired, I'm a beginner, now I'm full of mistakes Which Android Studio should I install with which sdk and gradle to have less errors?

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