Remove unused edit_white icon

src/skins/vector/img/edit_white.svg

@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Generator: Adobe Illustrator 15.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<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"
-	 width="512px" height="512px" viewBox="0 0 512 512" enable-background="new 0 0 512 512" xml:space="preserve">
-<g>
-	
-		<rect x="178.848" y="92.092" transform="matrix(0.7071 0.7071 -0.7071 0.7071 261.4346 -92.9272)" fill="#FFFFFF" width="128.084" height="354.045"/>
-	<path fill="#FFFFFF" d="M471.723,88.393l-48.114-48.114c-11.724-11.724-31.559-10.896-44.305,1.85l-45.202,45.203l90.569,90.568
-		l45.202-45.202C482.616,119.952,483.445,100.116,471.723,88.393z"/>
-	<polygon fill="#FFFFFF" points="64.021,363.252 32,480 148.737,447.979 	"/>
-</g>
-</svg>