Remove unnecessary echart init option

frontend/src/app/components/hashrate-chart/hashrate-chart.component.ts

@@ -33,8 +33,6 @@ export class HashrateChartComponent implements OnInit {
   chartOptions: EChartsOption = {};
   chartInitOptions = {
     renderer: 'svg',
-    width: 'auto',
-    height: 'auto',
   };
 
   hashrateObservable$: Observable<any>;

frontend/src/app/components/hashrates-chart-pools/hashrate-chart-pools.component.ts

@@ -31,8 +31,6 @@ export class HashrateChartPoolsComponent implements OnInit {
   chartOptions: EChartsOption = {};
   chartInitOptions = {
     renderer: 'svg',
-    width: 'auto',
-    height: 'auto',
   };
 
   hashrateObservable$: Observable<any>;

frontend/src/app/components/pool-ranking/pool-ranking.component.ts

@@ -27,8 +27,6 @@ export class PoolRankingComponent implements OnInit {
   chartOptions: EChartsOption = {};
   chartInitOptions = {
     renderer: 'svg',
-    width: 'auto',
-    height: 'auto',
   };
   chartInstance: any = undefined;
 

frontend/src/app/components/pool/pool.component.ts

@@ -27,8 +27,6 @@ export class PoolComponent implements OnInit {
   chartOptions: EChartsOption = {};
   chartInitOptions = {
     renderer: 'svg',
-    width: 'auto',
-    height: 'auto',
   };
 
   blocks: BlockExtended[] = [];