fix: Don't use an unnecessary iterator (#1419)

Author: mikehazell

src/store/modules/segmentationModule/getSegmentsOnPixeldata.js

@@ -3,21 +3,5 @@
  * @param  {UInt16Array|Float32Array} pixelData The pixel data array.
  */
 export default function getSegmentsOnPixelData(pixelData) {
-  const segmentSet = new Set(pixelData);
-  const iterator = segmentSet.values();
-
-  const segmentsOnLabelmap = [];
-  let done = false;
-
-  while (!done) {
-    const next = iterator.next();
-
-    done = next.done;
-
-    if (!done) {
-      segmentsOnLabelmap.push(next.value);
-    }
-  }
-
-  return segmentsOnLabelmap;
+  return [...new Set(pixelData)];
 }