Remove unnecessary deps in simapp

[colin-axner]

Summary

Remove dependencies which are not strictly needed

Problem Definition

Our simapp contains module we do not use nor test, see comment on the circuit module

Proposal

Remove unnecessary deps such as:

• circuit
• evidence
• feegrant

Discussion point:
our simapp is likely used as a reference for chains, that would be the primary benefit of including unnecessary deps

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For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate contributors tagged/assigned

[faddat]

I recommend keeping these dependencies, as well as adding x/nft due the fact that I'm certain that the ibc-go simapp is used as a reference.

We should also make sure that when using the wasm clients feature, we don't leave any naming ambiguous.

[crodriguezvega]

After discussing, once the testing simapp has its own go.mod then ibc-go would not have anymore the unnecessary dependencies.

[crodriguezvega]

Now that #3968 is closed, those dependencies have been removed from ibc-go's go.mod.