Remove useful specs

Author: meequrox

lib/double_gis_monitor/application.ex

@@ -15,8 +15,6 @@ defmodule DoubleGisMonitor.Application do
   This callback is responsible for starting its supervision tree.
   """
   @impl true
-  @callback start(term(), term()) ::
-              {:ok, pid()} | {:ok, pid(), state :: term()} | {:error, reason :: term()}
   def start(_type, _args) do
     Logger.info("Application started, cwd is #{File.cwd!()}")
 
@@ -27,7 +25,6 @@ defmodule DoubleGisMonitor.Application do
   This callback is called after its supervision tree has been stopped.
   """
   @impl true
-  @callback stop(term()) :: :ok
   def stop(_state) do
     Logger.info("Application stopped")
   end

lib/double_gis_monitor/event_poller.ex

@@ -11,13 +11,6 @@ defmodule DoubleGisMonitor.EventPoller do
   @doc """
   Returns child specification for supervisor.
   """
-  @spec child_spec() :: %{
-          :id => atom() | term(),
-          :start => {module(), atom(), [term()]},
-          :restart => :permanent | :transient | :temporary,
-          :shutdown => timeout() | :brutal_kill,
-          :type => :worker | :supervisor
-        }
   def child_spec() do
     %{
       id: __MODULE__,

lib/double_gis_monitor/event_processor.ex

@@ -11,13 +11,6 @@ defmodule DoubleGisMonitor.EventProcessor do
   @doc """
   Returns child specification for supervisor.
   """
-  @spec child_spec() :: %{
-          :id => atom() | term(),
-          :start => {module(), atom(), [term()]},
-          :restart => :permanent | :transient | :temporary,
-          :shutdown => timeout() | :brutal_kill,
-          :type => :worker | :supervisor
-        }
   def child_spec() do
     %{
       id: __MODULE__,
@@ -28,7 +21,6 @@ defmodule DoubleGisMonitor.EventProcessor do
     }
   end
 
-  @spec start_link([]) :: {:error, any()} | {:ok, pid()}
   def start_link([]) do
     Agent.start_link(__MODULE__, :init, [], name: __MODULE__)
   end

lib/double_gis_monitor/repo.ex

@@ -33,7 +33,6 @@ defmodule DoubleGisMonitor.Repo do
     {:ok, Enum.reduce(outdated_db_events, 0, reduce_fn)}
   end
 
-  @spec insert_new(any()) :: list()
   def insert_new(events) do
     filter_fn = fn e -> ensure_inserted?(e) end
     Enum.filter(events, filter_fn)

lib/double_gis_monitor/supervisor.ex

@@ -25,11 +25,10 @@ defmodule DoubleGisMonitor.Supervisor do
   ## Callbacks
   #############
 
-  @impl true
-  @callback init(init_arg :: term()) :: {:ok, tuple()}
   @doc """
   Callback invoked to start the supervision tree.
   """
+  @impl true
   def init([]) do
     Logger.info("Supervisor started")