fix: fix uneeded async func def

[yezizp2012]

What's changed and what's your intention?

As title.

Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests

Refer to a related PR or issue link (optional)

[codecov]

Codecov Report

Merging #315 (7d086ca) into main (b37caff) will increase coverage by 0.01%.
The diff coverage is 69.23%.

@@             Coverage Diff              @@
##               main     #315      +/-   ##
============================================
+ Coverage     74.20%   74.21%   +0.01%     
  Complexity     2665     2665              
============================================
  Files           856      856              
  Lines         48496    48489       -7     
  Branches       1586     1586              
============================================
  Hits          35988    35988              
+ Misses        11696    11689       -7     
  Partials        812      812              

Flag	Coverage Δ
java	61.93% <ø> (ø)
rust	79.48% <69.23%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
rust/meta/src/dashboard/mod.rs	0.00% <ø> (ø)
rust/meta/src/barrier/command.rs	46.80% <33.33%> (+2.80%)	⬆️
rust/meta/src/stream/meta.rs	56.16% <50.00%> (ø)
rust/meta/src/barrier/mod.rs	68.23% <100.00%> (ø)
rust/meta/src/stream/stream_manager.rs	92.11% <100.00%> (+0.94%)	⬆️
rust/meta/src/hummock/compaction.rs	64.38% <0.00%> (+0.68%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b37caff...7d086ca. Read the comment docs.