fixed docs in db Schema classes

framework/yii/db/Schema.php

@@ -216,7 +216,7 @@ abstract class Schema extends Object
 	 * This method should be overridden by child classes in order to support this feature
 	 * because the default implementation simply throws an exception.
 	 * @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
-	 * @return array all table names in the database. The names have NO the schema name prefix.
+	 * @return array all table names in the database. The names have NO schema name prefix.
 	 * @throws NotSupportedException if this method is called
 	 */
 	protected function findTableNames($schema = '')

framework/yii/db/mssql/Schema.php

@@ -332,10 +332,8 @@ SQL;
 
 	/**
 	 * Returns all table names in the database.
-	 * This method should be overridden by child classes in order to support this feature
-	 * because the default implementation simply throws an exception.
 	 * @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
-	 * @return array all table names in the database. The names have NO the schema name prefix.
+	 * @return array all table names in the database. The names have NO schema name prefix.
 	 */
 	protected function findTableNames($schema = '')
 	{

framework/yii/db/mysql/Schema.php

@@ -236,10 +236,8 @@ class Schema extends \yii\db\Schema
 
 	/**
 	 * Returns all table names in the database.
-	 * This method should be overridden by child classes in order to support this feature
-	 * because the default implementation simply throws an exception.
 	 * @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
-	 * @return array all table names in the database. The names have NO the schema name prefix.
+	 * @return array all table names in the database. The names have NO schema name prefix.
 	 */
 	protected function findTableNames($schema = '')
 	{