Fix incorrect positioning of labels on initial render

ui/src/shared/components/LineGraph.js

@@ -159,12 +159,11 @@ export default React.createClass({
       : overrideLineColors
 
     return (
-      <div className={`dygraph ${this.yLabelClass()}`} style={{height: '100%'}}>
+      <div className="dygraph graph--hasYLabel" style={{height: '100%'}}>
         {isRefreshing ? this.renderSpinner() : null}
         <Dygraph
           axes={axes}
           queries={queries}
-          dygraphRef={this.dygraphRefFunc}
           containerStyle={{width: '100%', height: '100%'}}
           overrideLineColors={lineColors}
           isGraphFilled={showSingleStat ? false : isGraphFilled}
@@ -195,26 +194,6 @@ export default React.createClass({
     )
   },
 
-  yLabelClass() {
-    const dygraph = this.dygraphRef
-
-    if (!dygraph) {
-      return 'graph--hasYLabel'
-    }
-
-    const label = dygraph.querySelector('.dygraph-ylabel')
-
-    if (!label) {
-      return ''
-    }
-
-    return 'graph--hasYLabel'
-  },
-
-  dygraphRefFunc(dygraphRef) {
-    this.dygraphRef = dygraphRef
-  },
-
   renderSpinner() {
     return (
       <div className="graph-panel__refreshing">