refactor code

src/mechanize/file.cr

@@ -6,12 +6,5 @@ class MechanizeCr::File
     @uri  = uri
     @body = body
     @code = code
-
-    #@full_path = false unless defined? @full_path
-
-    #fill_header response
-    #extract_filename
-
-    #yield self if block_given?
   end
 end

src/mechanize/node.cr

@@ -1,6 +1,5 @@
 require "myhtml"
-
-# This is a fake node.
+# This is a fake node used when sending post request. 
 class Node < Hash(String,String)
   def css(str)
     [] of Hash(String,String)
@@ -8,7 +7,7 @@ class Node < Hash(String,String)
 end
 
 
-# This is a real Node.
+# This is a real Node got from html.
 struct Myhtml::Node
   delegate :[], to: attributes
   delegate :[]=, to: attributes