Remove unnecessary css in examples

examples/earthquake-clusters.css

@@ -1,18 +0,0 @@
-#map {
-  position: relative;
-}
-#info {
-  position: absolute;
-  height: 1px;
-  width: 1px;
-  z-index: 100;
-}
-.tooltip.in {
-  opacity: 1;
-}
-.tooltip.top .tooltip-arrow {
-  border-top-color: white;
-}
-.tooltip-inner {
-  border: 2px solid white;
-}

examples/icon-color.css

@@ -1,3 +0,0 @@
-#map {
-  position: relative;
-}

examples/icon.css

@@ -1,3 +0,0 @@
-#map {
-  position: relative;
-}