replaced boxed-bg images with static color

build/less/core.less

@@ -34,7 +34,7 @@ body {
 }
 
 .layout-boxed {
-  background: url('@{boxed-layout-bg-image-path}') repeat fixed;
+  background-color: @sidebar-light-bg;
 }
 
 /*

build/less/variables.less

 // AdminLTE 2 Variables.less
 // =========================
 
-// PATHS
-// --------------------------------------------------------
-
-@boxed-layout-bg-image-path: "../img/boxed-bg.jpg";
-
 // COLORS
 // --------------------------------------------------------
 // Primary

build/scss/_variables.scss

@@ -4,7 +4,6 @@
 // PATHS
 // --------------------------------------------------------
 $path-to-bootstrap-sass: "../../bower_components/bootstrap/scss" !default;
-$boxed-layout-bg-image-path: "../img/boxed-bg.jpg" !default;
 
 // COLORS
 // --------------------------------------------------------