Remove dead code

[gusin13]

There is still some dead left over code like this

staking-api-service/internal/shared/api/handlers/handler/handler.go

Lines 210 to 224 in bd3f529

	func ParseFPStateQuery(r *http.Request, isOptional bool) (types.FinalityProviderQueryingState, *types.Error) {
	state := r.URL.Query().Get("state")
	if state == "" {
	if isOptional {
	return "", nil
	}
	}
	stateEnum, err := indexerdbmodel.FromStringToFinalityProviderState(state)
	if err != nil {
	return "", types.NewErrorWithMsg(
	http.StatusBadRequest, types.BadRequest, err.Error(),
	)
	}
	return stateEnum, nil
	}

find and remove what is not used