remove theme slugs

rainfall/templates/404.html

@@ -1,4 +1,4 @@
-<!-- wp:template-part {"slug":"header","theme":"rainfall"} /-->
+<!-- wp:template-part {"slug":"header"} /-->
 
 <!-- wp:group {"layout":{"inherit":true},"tagName":"main", "style":{"spacing":{"margin":{"top":"0px","right":"0px","bottom":"0px","left":"0px"}}}} -->
 <main class="wp-block-group" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px">
@@ -6,4 +6,4 @@
 </main>
 <!-- /wp:group -->
 
-<!-- wp:template-part {"slug":"footer","theme":"rainfall"} /-->
+<!-- wp:template-part {"slug":"footer"} /-->