fix: remove setRequestHeader

[xiaoyuhen]

fix: remove setRequestHeader

Description

close #90

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

[codecov-io]

Codecov Report

Merging #91 into master will increase coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #91      +/-   ##
==========================================
+ Coverage   50.48%   50.53%   +0.05%     
==========================================
  Files         124      124              
  Lines        1769     1767       -2     
==========================================
  Hits          893      893              
+ Misses        876      874       -2

Impacted Files	Coverage Δ
packages/griffith-mp4/src/fetch.js	0% <ø> (ø)	⬆️

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