Separating theme from layout for CSS files.

Change-Id: I4c3cec28b30de8026df4298f65ebf6ad92faf68f
(cherry picked from commit 11f662f)
diff --git a/web/gui/src/main/webapp/app/fw/svg/glyph.css b/web/gui/src/main/webapp/app/fw/svg/glyph.css
index 866aada..bc52741 100644
--- a/web/gui/src/main/webapp/app/fw/svg/glyph.css
+++ b/web/gui/src/main/webapp/app/fw/svg/glyph.css
@@ -15,20 +15,10 @@
  */
 
 /*
- ONOS GUI -- Glyph Service -- CSS file
+ ONOS GUI -- Glyph Service (layout) -- CSS file
  */
 
 svg .glyph {
     stroke: none;
     fill-rule: evenodd;
 }
-
-.light svg .glyph,
-.dark svg .glyph.overlay {
-    fill: black;
-}
-
-.dark svg .glyph,
-.light svg .glyph.overlay {
-    fill: white;
-}