Update inline comment

Co-authored-by: Weston Ruter <westonruter@google.com>

includes/sanitizers/class-amp-script-sanitizer.php

@@ -141,7 +141,7 @@ public function sanitize() {
 			$sanitizer_arg_updates[ AMP_Img_Sanitizer::class ]['native_img_used']           = true;
 		}
 
-		// When custom scripts are on the page, turn off some CSS because processing it is
+		// When custom scripts are on the page, turn off some CSS processing because it is
 		// unnecessary for a valid AMP page and which can break custom scripts.
 		if ( $this->px_verified_kept_node_count > 0 || $this->kept_script_count > 0 ) {
 			$sanitizer_arg_updates[ AMP_Style_Sanitizer::class ]['transform_important_qualifiers'] = false;