Remove outdated examples and framework pieces

sky/framework/inspector/css-agent.sky

-<script>
-class CSS {
-  constructor(domAgent) {
-    this.domAgent_ = domAgent;
-    Object.preventExtensions(this);
-  }
-
-  enable() {
-  }
-
-  getInlineStylesForNode(params) {
-    return {
-      "inlineStyle": {
-        "cssProperties": [],
-        "shorthandEntries": [],
-        "styleSheetId": "0",
-        "range": {
-          "startLine": 0,
-          "startColumn": 0,
-          "endLine": 0,
-          "endColumn": 0
-        },
-        "cssText": "",
-      }
-    };
-  }
-
-  getComputedStyleForNode(params) {
-    var node = this.domAgent_.getNodeForId(params.nodeId);
-    if (!node){
-      console.log("Error, missing node" + params.nodeId);
-      return { "computedStyle": [] };
-    }
-    var style = window.getComputedStyle(node, null);
-    if (!style){
-      console.log("Error, no computed style for " + params.nodeId + " " + node);
-      return { "computedStyle": [] };
-    }
-    var computedStyles = [];
-    for (var i = 0; i < style.length; i++) {
-      var name = style.item(i);
-      computedStyles.push({
-        "name": name,
-        "value": style.getPropertyValue(name),
-      });
-    }
-    return {
-      "computedStyle": computedStyles,
-    };
-  }
-}
-
-module.exports = CSS;
-</script>