remove unused methods

src/kemal/handler.cr

@@ -32,7 +32,6 @@ class Kemal::Handler < HTTP::Handler
       route = lookup.payload as Route
       context.request.url_params = lookup.params
       begin
-        context.response.content_type = "text/html"
         body = route.handler.call(context).to_s
         context.response.print body
         return context

src/kemal/response.cr

@@ -1,15 +0,0 @@
-class Kemal::Response
-  property headers
-  property status_code
-  property content_type
-
-  def initialize
-    @status_code = 200
-    @content_type = "text/html"
-    @headers = HTTP::Headers{"Content-Type": @content_type}
-  end
-
-  def content_type=(content_type)
-    @headers["Content-Type"] = content_type
-  end
-end