remove raf

[yoyo837]

prepare for ant-design/ant-design#27864

[codecov]

Codecov Report

Merging #180 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #180   +/-   ##
=======================================
  Coverage   85.74%   85.74%           
=======================================
  Files           7        7           
  Lines         505      505           
  Branches      146      146           
=======================================
  Hits          433      433           
  Misses         72       72           

Impacted Files	Coverage Δ
src/Popup.tsx	91.04% <ø> (ø)

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[yoyo837]

This is out date. #197