remove extraneous icons.css line

generator/css/icons.css

@@ -890,7 +890,6 @@
 .icon-iceberg { background-image: url(../img/iceberg.png);}
 .icon-icebergs { background-image: url(../img/icebergs.png);}
 .icon-icicles-fence { background-image: url(../img/icicles-fence.png);}
-.icon-icons { background-image: url(../img/icons.css);}
 .icon-ifrit { background-image: url(../img/ifrit.png);}
 .icon-igloo { background-image: url(../img/igloo.png);}
 .icon-imbricated-arrows { background-image: url(../img/imbricated-arrows.png);}