[SwapRouter] misc: Delete duplication of SwapAmountInRoute between gamm module and swap router module

[mattverse]

Background

cref: #3880 (comment)

Right now, we have two implementations of SwapAmountInRoute, one in the gamm module(legacy) and the new SwapAmountInRoute struct / proto that has been introduced in the swap router module.

There is no reason to keep both structs: the goal of this issue is to delete the SwapAmountInRoute from the gamm module and remove duplication of the struct between modules.

The same goes for SwapAmountOutRoute.

Suggested Design

• Remove SwapAmountInRoute from gamm module
• Remove SwapAmountOutRoute from gamm module

[hieuvubk]

Could I work with it

[mattverse]

@hieuvubk We're trying to get the swap router / concentrated liquidity asap, but as long as this doesn't take to long, yeah go for it!

[p0mvn]

Would like to note that this is blocked on #3880. Please wait for that to be merged

[p0mvn]

Marked this as "Help wanted" since this is not on the critical path.

[phamminh0811]

Could I work with it?

[mattverse]

@phamminh0811 yes please!