chore: remove slots mixin

src/mixins/slots.js

@@ -1,18 +0,0 @@
-/**
- * Use scopedSlots in Vue 2.6+
- * downgrade to slots in lower version
- */
-export const SlotsMixin = {
-  methods: {
-    slots(name = 'default', props) {
-      const { $slots, $scopedSlots } = this;
-      const scopedSlot = $scopedSlots[name];
-
-      if (scopedSlot) {
-        return scopedSlot(props);
-      }
-
-      return $slots[name];
-    },
-  },
-};