Remove leftover loading_state from graph.

Author: T4rk1n

components/dash-core-components/src/fragments/Graph.react.js

@@ -474,10 +474,7 @@ class PlotlyGraph extends Component {
     shouldComponentUpdate(nextProps) {
         return (
             this.props.id !== nextProps.id ||
-            JSON.stringify(this.props.style) !==
-                JSON.stringify(nextProps.style) ||
-            JSON.stringify(this.props.loading_state) !==
-                JSON.stringify(nextProps.loading_state)
+            JSON.stringify(this.props.style) !== JSON.stringify(nextProps.style)
         );
     }