Revert "refactor: use const for shuffled in getRandomSubarray function"

This reverts commit 668f9a4.

Author: danmarshall

src/views/DataThread.tsx

@@ -387,8 +387,7 @@ export const DataThread: FC<{}> = function ({ }) {
                 return x - Math.floor(x);
             }
             const getRandomSubarray = (arr: any[], size: number) => {
-                const shuffled = arr.slice(0);
-                let i = arr.length, temp, index;
+                let shuffled = arr.slice(0), i = arr.length, temp, index;
                 while (i--) {
                     index = Math.floor((i + 1) * getRandom(233 * i + 888));
                     temp = shuffled[index];

src/views/EncodingShelfThread.tsx

@@ -94,8 +94,7 @@ export const ChartElementFC: FC<{chart: Chart, tableRows: any[], boxWidth?: numb
             return x - Math.floor(x);
         }
         const getRandomSubarray = (arr: any[], size: number) => {
-            const shuffled = arr.slice(0);
-            let i = arr.length, temp, index;
+            let shuffled = arr.slice(0), i = arr.length, temp, index;
             while (i--) {
                 index = Math.floor((i + 1) * getRandom(233 * i + 888));
                 temp = shuffled[index];