Cleanup: enable lint of revive(superfluous-else)

[liangyuanpeng]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Enable lint of revive(superfluous-else)

Which issue(s) this PR fixes:
Partof #4490

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c218f93) 51.87% compared to head (59cd00d) 51.85%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4493      +/-   ##
==========================================
- Coverage   51.87%   51.85%   -0.02%     
==========================================
  Files         243      243              
  Lines       24181    24181              
==========================================
- Hits        12543    12540       -3     
- Misses      10957    10959       +2     
- Partials      681      682       +1     

Flag	Coverage Δ
unittests	51.85% <ø> (-0.02%)	⬇️

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[jwcesign]

/lgtm
/cc @RainbowMango

[RainbowMango]

https://github.com/mgechev/revive/blob/master/RULES_DESCRIPTIONS.md#superfluous-else

Description: To improve the readability of code, it is recommended to reduce the indentation as much as possible. This rule highlights redundant else-blocks that can be eliminated from the code.

I like this rule.
/lgtm
/approve

[karmada-bot]

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