Update blocks.jsx

src/containers/blocks.jsx

@@ -85,7 +85,6 @@ class Blocks extends React.Component {
         this.toolboxUpdateQueue = [];
     }
     componentDidMount () {
-        window.vm = this.props.vm;
         this.ScratchBlocks.FieldColourSlider.activateEyedropper_ = this.props.onActivateColorPicker;
         this.ScratchBlocks.Procedures.externalProcedureDefCallback = this.props.onActivateCustomProcedures;
         this.ScratchBlocks.ScratchMsgs.setLocale(this.props.locale);