* chore: 🤖 Update react-vtkjs-viewport and refactor vtk extension

* chore: 🤖 Update react-vtkjs-viewport and refactor vtk extension

extensions/vtk/src/utils/setMPRLayout.js

@@ -4,7 +4,7 @@ export default function setMPRLayout(
   displaySet,
   viewportPropsArray,
   numRows = 1,
-  numColumns = 3
+  numColumns = 1
 ) {
   return new Promise((resolve, reject) => {
     const viewports = [];

extensions/vtk/src/utils/vtkViewportSubscriptionManager.js

@@ -1,28 +0,0 @@
-const subscriptions = [];
-
-// This is pretty hacky right now, but it makes sure we don't keep adding subscriptions.
-// TODO -> Nuke this and move it up a layer once we have more vigorous layout support.
-
-const vtkViewportSubscriptionManager = {
-  subscriptions,
-  pushSubscription(viewportIndex, subscription) {
-    if (!Array.isArray(subscriptions[viewportIndex])) {
-      subscriptions[viewportIndex] = [];
-    }
-
-    subscriptions[viewportIndex].push(subscription);
-  },
-  unsubscribe(viewportIndex) {
-    if (!subscriptions[viewportIndex]) {
-      return;
-    }
-
-    while (subscriptions[viewportIndex].length) {
-      subscriptions[viewportIndex].pop().unsubscribe();
-    }
-
-    subscriptions[viewportIndex] = null;
-  },
-};
-
-export default vtkViewportSubscriptionManager;