Revert "feat(user): add ecto migration for user"

This reverts commit 9613fcebde.

lib/ketbin/api/user.ex

@@ -1,3 +0,0 @@
-defmodule Ketbin.Api.User do
-
-end

lib/ketbin/arch.ex

@@ -1,18 +0,0 @@
-defmodule Ketbin.Schema do
-    @moduledoc """
-    Ketbin keeps the contexts that define your schemas
-    """
-end
-
-
-defmodule Ketbin.Crud do
-    @moduledoc """
-    Ketbin keeps the contexts that define your CRUD functions
-    """
-end
-
-defmodule Ketbin.Api do
-    @moduledoc """
-    Ketbin keeps the contexts that define your business logic.
-    """
-end

lib/ketbin/crud/user.ex

@@ -1,3 +0,0 @@
-defmodule Ketbin.Crud.User do
-    
-end

lib/ketbin/schema/user.ex

@@ -1,17 +0,0 @@
-defmodule Ketbin.Schema.User do
-  use Ecto.Schema
-  import Ecto.Changeset
-
-  schema "users" do
-    field :firebase_id, :string
-
-    timestamps()
-  end
-
-  @doc false
-  def changeset(user, attrs) do
-    user
-    |> cast(attrs, [:firebase_id])
-    |> validate_required([:firebase_id])
-  end
-end