revert(v-footer): revert deaf2c8

not the proper fix

Author: johnleider

src/components/VFooter/VFooter.js

@@ -70,8 +70,6 @@ export default {
      * @return {number}
      */
     updateApplication () {
-      if (this.inset) return 0
-
       const height = parseInt(this.height)
 
       return isNaN(height)

test/unit/components/VFooter/VFooter.spec.js

@@ -94,7 +94,6 @@ test('VFooter.js', ({ mount, functionalContext }) => {
 
     await wrapper.vm.$nextTick()
     expect(wrapper.vm.computedPaddingLeft).toBe(300)
-    expect(wrapper.vm.$vuetify.application.footer).toBe(0)
   })
 
   it('should accept an auto height', async () => {