fix(multisig): remove old migration

[cjcobb23]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 93.46%. Comparing base (52bfbc3) to head (2a38a30).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
contracts/multisig/src/contract.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #705      +/-   ##
==========================================
- Coverage   93.49%   93.46%   -0.03%     
==========================================
  Files         234      233       -1     
  Lines       34939    34660     -279     
==========================================
- Hits        32667    32396     -271     
+ Misses       2272     2264       -8     

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