Don't require yaml

src/kemal/config.cr

@@ -1,5 +1,3 @@
-require "yaml"
-
 module Kemal
   class Config
     INSTANCE = Config.new

src/kemal/param_parser.cr

@@ -3,7 +3,6 @@ require "json"
 # ParamParser parses the request contents including query_params and body
 # and converts them into a params hash which you can within the environment
 # context.
-
 alias AllParamTypes = Nil | String | Int64 | Float64 | Bool | Hash(String, JSON::Type) | Array(JSON::Type)
 
 class Kemal::ParamParser

src/kemal/route_handler.cr

@@ -3,7 +3,6 @@ require "radix"
 
 # Kemal::RouteHandler is the main handler which handles all the HTTP requests. Routing, parsing, rendering e.g
 # are done in this handler.
-
 class Kemal::RouteHandler < HTTP::Handler
   INSTANCE = new
 

src/kemal/websocket_handler.cr

@@ -1,6 +1,5 @@
 # Kemal::WebSocketHandler is used for each define WebSocket route.
 # For each WebSocket route a new handler is created and registered to global handlers.
-
 class Kemal::WebSocketHandler < HTTP::WebSocketHandler
   def initialize(@path, &@proc : HTTP::WebSocket ->)
     Kemal.config.add_ws_handler self