refactor(kernel): remove unused methods on EventDispatcher

[sebastijankuzner]

Summary

• remove unused methods from EventDispatcher
• make handle async on EvenListeners

Checklist

• Tests (if necessary)
• Ready to be merged

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.41%. Comparing base (feefb65) to head (46d8cff).
⚠️ Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
packages/evm-api-worker/source/worker.ts	50.00%	1 Missing ⚠️
...ckages/p2p/source/downloader/message-downloader.ts	0.00%	1 Missing ⚠️
packages/p2p/source/peer-processor.ts	0.00%	1 Missing ⚠️
packages/transaction-pool-worker/source/worker.ts	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1240      +/-   ##
===========================================
+ Coverage    53.09%   53.41%   +0.31%     
===========================================
  Files         1121     1124       +3     
  Lines        62313    62675     +362     
  Branches      1700     1773      +73     
===========================================
+ Hits         33088    33478     +390     
+ Misses       29070    29065       -5     
+ Partials       155      132      -23     

Flag	Coverage Δ
contracts	98.60% <ø> (?)
packages	53.10% <66.66%> (+<0.01%)	⬆️

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