array.sh: don't need ${} here

src/array.sh

@@ -265,7 +265,7 @@ array::bsort() {
     local elem i j
     for (( i = 0; i <= ${#arr[@]} - 2; ++i )); do
         for (( j = i + 1; j <= ${#arr[@]} - 1; ++j )); do
-            if (( ${arr[i]} > ${arr[j]} )); then
+            if (( arr[i] > arr[j] )); then
                 elem=${arr[i]}
                 arr[i]=${arr[j]}
                 arr[j]=$elem