🔥 refactor(examples): Remove unnecesary code

[kazupon]

Issue:

What I did

Refactor vue example code (.vue)

How to test

Please review.

[ndelangen]

If you tested this locally, go ahead and merge!

[codecov]

Codecov Report

Merging #1574 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1574      +/-   ##
==========================================
+ Coverage   20.41%   20.43%   +0.01%     
==========================================
  Files         241      241              
  Lines        5255     5252       -3     
  Branches      664      660       -4     
==========================================
  Hits         1073     1073              
- Misses       3660     3676      +16     
+ Partials      522      503      -19

Impacted Files	Coverage Δ
lib/ui/src/modules/ui/containers/left_panel.js	25% <0%> (ø)	⬆️
app/react-native/src/bin/storybook-start.js	0% <0%> (ø)	⬆️
addons/info/src/components/Node.js	38.88% <0%> (ø)	⬆️
addons/info/src/components/markdown/htags.js	30% <0%> (ø)	⬆️
...rc/modules/ui/components/left_panel/text_filter.js	33.33% <0%> (ø)	⬆️
addons/info/src/components/Props.js	37.2% <0%> (ø)	⬆️
addons/knobs/src/KnobManager.js	35.41% <0%> (ø)	⬆️
addons/storyshots/src/storybook-channel-mock.js	0% <0%> (ø)	⬆️
app/react/src/server/index.html.js	0% <0%> (ø)	⬆️
addons/knobs/src/components/types/Number.js	8.06% <0%> (ø)	⬆️
... and 16 more

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[kazupon]

OK! 💪