Move PropTypes to just above proptype declarations

ui/src/shared/components/LineGraph.js

@@ -7,8 +7,6 @@ import timeSeriesToDygraph from 'utils/timeSeriesToDygraph'
 
 import {SINGLE_STAT_LINE_COLORS} from 'src/shared/graphs/helpers'
 
-const {array, arrayOf, bool, func, number, shape, string} = PropTypes
-
 class LineGraph extends Component {
   constructor(props) {
     super(props)
@@ -132,6 +130,8 @@ const GraphSpinner = () =>
     <div className="graph-spinner" />
   </div>
 
+const {array, arrayOf, bool, func, number, shape, string} = PropTypes
+
 LineGraph.defaultProps = {
   underlayCallback: () => {},
   isGraphFilled: true,