John Gill Commentary 2 Chronicles 15:16

"And also Maacah, the mother of Asa the king, he removed from being queen, because she had made an abominable image for an Asherah; and Asa cut down her image, and made dust of it, and burnt it at the brook Kidron." — 2 Chronicles 15:16 (ASV)

Ver. 16-18. And also concerning Maachah the mother of Asa the king ,
&c.] Or rather his grandmother, (1 Kings 15:10) ,

he removed her from being queen ;
the Septuagint version is, "that she should not minister to Astarte"; which was the goddess of the Zidonians; of this and the two next verses, (See Gill on 1 Kings 15:13), (See Gill on 1 Kings 15:14), (See Gill on 1 Kings 15:15).