Maybe turning on the Apache's mod_rewrite module would make it work or you just need to remove "rewritecond %{HTTPS} off".
For example:
RewriteEngine On
RewriteCond %{HTTP_HOST} ^www.example.com$ [NC]
RewriteRule ^(.*)$ http://example.com/$1[R=301,L]
or in your case:
RewriteEngine On
RewriteCond %{HTTP_HOST} ^www.sculpturebyspirit.com$ [NC] [Not RewriteCond %{HTTPS_HOST} ^www.sculpturebyspirit.com$ [NC]??? A guess.}
RewriteRule ^(.*)$ http://sculpturebyspirit.com/$1[R=301,L] [Not RewriteRule ^(.*)$ https://sculpturebyspirit.com/$1 [R=301,L]]
I believe once the "www." is removed from the non-secure version, the secure version should follow suit. Been wrong before. 
Edited by AstraNut, 15 February 2017 - 12:21 PM.