feat(Card): allow use bottom slot without price or num (#5116)

src/card/test/__snapshots__/index.spec.js.snap

@@ -4,9 +4,7 @@ exports[`render bottom slot 1`] = `
 <div class="van-card">
   <div class="van-card__header">
     <div class="van-card__content">
-      <div class="van-card__bottom">
-        <div class="van-card__price">¥ 100</div>Custom Bottom
-      </div>
+      <div class="van-card__bottom">Custom Bottom</div>
     </div>
   </div>
 </div>

src/card/test/index.spec.js

@@ -65,9 +65,6 @@ test('render origin-price slot', () => {
 
 test('render bottom slot', () => {
   const wrapper = mount(Card, {
-    propsData: {
-      price: 100
-    },
     scopedSlots: {
       bottom: () => 'Custom Bottom'
     }