src/Db/Migration.php
public function dropCommentFromColumn($table, $column)
    {
        $cmdPromise = $this->createCommand()->dropCommentFromColumn($table, $column)->execute();
        return $this->execPromise($cmdPromise, "drop comment from column $column");
    }
public function dropCommentFromColumn($table, $column)
    {
        $cmdPromise = $this->createCommand()->dropCommentFromColumn($table, $column)->execute();
        return $this->execPromise($cmdPromise, "drop comment from column $column");
    }
Builds and execute a SQL statement for dropping comment from column.

@param string $table the table whose column is to be commented. The table name will be properly quoted by the method.
@param string $column the name of the column to be commented. The column name will be properly quoted by the method.
@return LazyPromiseInterface