Removes legacy dispatched type from OriginHub

[trajan0x]

Description

Removes now unused Dispatch type from OriginHub

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@1d50890). Click here to learn what that means.
Patch coverage: 52.65911% of modified lines in pull request are covered.
Report is 4 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master       #1370   +/-   ##
============================================
  Coverage          ?   56.69889%           
============================================
  Files             ?         472           
  Lines             ?       32789           
  Branches          ?         277           
============================================
  Hits              ?       18591           
  Misses            ?       12493           
  Partials          ?        1705           

Flag	Coverage Δ
agents	47.08967% <52.65911%> (?)
packages	83.42541% <ø> (?)
solidity	93.00244% <ø> (?)

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

Files Changed	Coverage Δ
agents/config/agent_config.go	0.00000% <ø> (ø)
agents/config/executor/config.go	44.44444% <ø> (ø)
agents/config/scribe.go	0.00000% <ø> (ø)
agents/testutil/simulated_backends_suite.go	0.00000% <0.00000%> (ø)
agents/testutil/typecast.go	6.25000% <0.00000%> (ø)
agents/types/agent_status.go	0.00000% <0.00000%> (ø)
agents/types/chain_gas.go	50.00000% <0.00000%> (ø)
agents/types/dispute_status.go	0.00000% <0.00000%> (ø)
agents/types/fraud_attestation.go	0.00000% <0.00000%> (ø)
agents/types/fraud_snapshot.go	0.00000% <0.00000%> (ø)
... and 26 more

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[trajan0x]

ignore codecov for this, this was caused by [ci skip] being in the commit body when #1280 was merged