Remove fill from extruderColor icon

resources/themes/cura-light/icons/medium/ExtruderColor.svg

@@ -2,9 +2,7 @@
 <!-- Generator: Adobe Illustrator 24.3.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
 <svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
 	 viewBox="0 0 30 30" style="enable-background:new 0 0 30 30;" xml:space="preserve">
-<style type="text/css">
-	.st0{fill:#231F20;}
-</style>
+
 <g id="Layer_1_1_">
 	<path class="st0" d="M15,26C8.9,26,4,21.1,4,15S8.9,4,15,4s11,4.9,11,11S21.1,26,15,26z M15,8c-3.8,0-7,3.2-7,7s3.2,7,7,7
 		s7-3.1,7-7S18.9,8,15,8z"/>