style: remove empty comments for license

[FGYFFFF]

What type of PR is this?

style

Check the PR title.

• This PR title match the format: <type>(optional scope): <description>
• The description of this PR title is user-oriented and clear enough for others to understand.

(Optional) Translate the PR title into Chinese.

去掉 license 顶层的空注释

(Optional) More detail description for this PR(en: English/zh: Chinese).

en: remove empty comments for license
zh(optional): 去掉 license 顶层的空注释

Which issue(s) this PR fixes:

[codecov]

Codecov Report

Base: 64.54% // Head: 64.50% // Decreases project coverage by -0.03% ⚠️

Coverage data is based on head (6d29b73) compared to base (90536d9).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #316      +/-   ##
===========================================
- Coverage    64.54%   64.50%   -0.04%     
===========================================
  Files           85       85              
  Lines         8315     8315              
===========================================
- Hits          5367     5364       -3     
- Misses        2585     2588       +3     
  Partials       363      363              

Impacted Files	Coverage Δ
pkg/network/netpoll/dial.go	0.00% <ø> (ø)
pkg/route/default.go	100.00% <ø> (ø)
pkg/common/compress/compress.go	80.95% <0.00%> (-2.86%)	⬇️

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[li-jin-gou]

thanks @FGYFFFF