I have this script which removes all indexes from a table. However, as primary keys should be handled differently, I need to adjust this script so it will not grab a primary key. Is that possible?

DECLARE tableIndexes CURSOR FOR
SELECT name FROM sysindexes
WHERE id = OBJECT_ID(N'MyTable') AND
   indid > 0 AND indid < 255 AND
  INDEXPROPERTY(id, name, 'IsStatistics') = 0
ORDER BY indid DESC

OPEN tableIndexes
FETCH NEXT FROM tableIndexes INTO @indexName
WHILE @@fetch_status = 0
BEGIN
  SET @dropIndexSql = N'DROP INDEX MyTable.' + @indexName
  EXEC sp_executesql @dropIndexSql
  FETCH NEXT FROM tableIndexes INTO @indexName
END