get rid off now unnecessary function definitions

lib/benchee/formatters/console.ex

@@ -8,7 +8,7 @@ defmodule Benchee.Formatters.Console do
       flat_map           2.40 K      417.00 μs     ±9.40%      411.45 μs      715.21 μs
       map.flatten        1.24 K      806.89 μs    ±16.62%      768.02 μs     1170.67 μs
 
-      Comparison: 
+      Comparison:
       flat_map           2.40 K
       map.flatten        1.24 K - 1.93x slower
 
@@ -26,8 +26,6 @@ defmodule Benchee.Formatters.Console do
   alias Benchee.Suite
   alias Benchee.Formatters.Console.{Memory, RunTime}
 
-  def format(suite), do: format(suite, %{})
-
   @doc """
   Formats the benchmark statistics to a report suitable for output on the CLI.
 
@@ -80,7 +78,7 @@ defmodule Benchee.Formatters.Console do
   """
   @impl true
   @spec format(Suite.t(), map) :: [any]
-  def format(%Suite{scenarios: scenarios, configuration: config}, options) do
+  def format(%Suite{scenarios: scenarios, configuration: config}, options \\ %{}) do
     if Map.has_key?(options, :unit_scaling), do: warn_unit_scaling()
 
     config =
@@ -109,14 +107,12 @@ defmodule Benchee.Formatters.Console do
     end
   end
 
-  def write(suite), do: write(suite, %{})
-
   @doc """
   Takes the output of `format/1` and writes that to the console.
   """
   @impl true
   @spec write(any, map) :: :ok | {:error, String.t()}
-  def write(output, _options) do
+  def write(output, _options \\ %{}) do
     IO.write(output)
   rescue
     _ -> {:error, "Unknown Error"}