Fix delete button shown for io nodes

src/components/graph/selectionToolbox/DeleteButton.vue

@@ -1,5 +1,6 @@
 <template>
   <Button
+    v-show="isDeletable"
     v-tooltip.top="{
       value: t('commands.Comfy_Canvas_DeleteSelectedItems.label'),
       showDelay: 1000
@@ -13,10 +14,17 @@
 
 <script setup lang="ts">
 import Button from 'primevue/button'
+import { computed } from 'vue'
 import { useI18n } from 'vue-i18n'
 
 import { useCommandStore } from '@/stores/commandStore'
+import { useCanvasStore } from '@/stores/graphStore'
 
 const { t } = useI18n()
 const commandStore = useCommandStore()
+const canvasStore = useCanvasStore()
+
+const isDeletable = computed(() =>
+  canvasStore.selectedItems.some((x) => x.removable !== false)
+)
 </script>