fix : removed the unnecessary usage of ErrInvalidMsg

[vishal-kanna]

Part of #1310

[codecov]

Codecov Report

Merging #1311 (7da4d9c) into main (887ee0e) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1311      +/-   ##
==========================================
+ Coverage   63.44%   63.47%   +0.02%     
==========================================
  Files          56       56              
  Lines        6971     6971              
==========================================
+ Hits         4423     4425       +2     
+ Misses       2219     2218       -1     
+ Partials      329      328       -1     

Impacted Files	Coverage Δ
x/wasm/types/tx.go	46.52% <100.00%> (ø)

... and 1 file with indirect coverage changes

[pinosu]

Thanks for your pr!
As part of #1310 , I don't think we need a new error type for each possible error. Probably the more generic ErrInvalid could be used.
In this case it could be something like:
if strings.EqualFold(msg.Sender, msg.NewAdmin) { return errorsmod.Wrap(ErrInvalid, "new admin is the same as the old") }
It would be nice to check if there are other places where ErrInvalidMsg usage is not proper.

[pinosu]

Thank you for your contribution! 💯