forcegraph: remove unused css

scss/_forcegraph.scss

@@ -5,20 +5,6 @@
 
   canvas {
     display: block;
-  }
-
-  svg {
-    display: block;
-    width: 100%;
-    height: 100%;
     position: absolute;
-    top: 0;
-    left: 0;
-
-    circle, line {
-      opacity: 0;
-      stroke-width: 16px;
-      cursor: pointer;
-    }
   }
 }