chore(transfers): remove unused "amount summaries" functions (#355)

apps/app/lib/app/transfers.ex

@@ -143,64 +143,6 @@ defmodule App.Transfers do
     |> offset(^offset)
   end
 
-  ## Amount summary
-
-  @typep amount_summary :: %{
-           type: MoneyTransfer.type(),
-           amount: Money.t(),
-           count: non_neg_integer()
-         }
-
-  @doc """
-  Returns the total amount of money transfers linked to a book, grouped by type.
-
-  The `:reimbursement` type is not included. If a book has no money transfers of a type,
-  the amount for this type will be `Money.zero(:EUR)` and the count is `0`.
-  """
-  @spec amounts_summary_for_book(Book.t()) :: %{MoneyTransfer.type() => amount_summary()}
-  def amounts_summary_for_book(book) do
-    amounts_summary_query()
-    |> where([money_transfer: money_transfer], money_transfer.book_id == ^book.id)
-    |> Repo.all()
-    |> Map.new(&{&1.type, &1})
-    |> fill_grouped_amounts_missing_types()
-  end
-
-  @doc """
-  Returns the total amount of money transfers tenanted by a member, grouped by type.
-
-  The `:reimbursement` type is not included. If a book has no money transfers of a type,
-  the amount for this type will be `Money.zero(:EUR)` and the count is `0`.
-  """
-  @spec amounts_summary_for_tenant(BookMember.t()) :: %{MoneyTransfer.type() => amount_summary()}
-  def amounts_summary_for_tenant(member) do
-    amounts_summary_query()
-    |> where([money_transfer: money_transfer], money_transfer.tenant_id == ^member.id)
-    |> Repo.all()
-    |> Map.new(&{&1.type, &1})
-    |> fill_grouped_amounts_missing_types()
-  end
-
-  defp amounts_summary_query do
-    from money_transfer in MoneyTransfer,
-      as: :money_transfer,
-      where: money_transfer.type != :reimbursement,
-      select: %{
-        type: money_transfer.type,
-        amount: sum(money_transfer.amount),
-        count: count(money_transfer.id)
-      },
-      group_by: money_transfer.type
-  end
-
-  defp fill_grouped_amounts_missing_types(grouped_amounts) do
-    Enum.reduce([:payment, :income], grouped_amounts, fn type, amounts ->
-      Map.put_new_lazy(amounts, type, fn ->
-        %{type: type, amount: Money.zero(:EUR), count: 0}
-      end)
-    end)
-  end
-
   ## CRUD
 
   @doc """