Remove file handler from CommonLogHandler. Log only to STDOUT. Fixes #159

src/kemal/base_log_handler.cr

@@ -2,7 +2,7 @@ require "http"
 
 # All loggers must inherit from `Kemal::BaseLogHandler`.
 class Kemal::BaseLogHandler < HTTP::Handler
-  def initialize(@env : String)
+  def initialize
   end
 
   def call(context)

src/kemal/common_log_handler.cr

@@ -4,14 +4,8 @@ class Kemal::CommonLogHandler < Kemal::BaseLogHandler
   @handler : IO::FileDescriptor
   getter handler
 
-  def initialize(@env)
-    @handler = if @env == "production"
-                 handler = File.new("kemal.log", "a")
-                 handler.flush_on_newline = true
-                 handler
-               else
-                 STDOUT
-               end
+  def initialize
+    @handler = STDOUT
   end
 
   def call(context)

src/kemal/config.cr

@@ -61,9 +61,9 @@ module Kemal
 
     def setup_log_handler
       @logger ||= if @logging
-                    Kemal::CommonLogHandler.new(@env)
+                    Kemal::CommonLogHandler.new
                   else
-                    Kemal::NullLogHandler.new(@env)
+                    Kemal::NullLogHandler.new
                   end
       HANDLERS.insert(0, @logger.not_nil!)
     end