Remove byte sniffing from Pure::Parser

Author: flori

lib/json/pure/parser.rb

@@ -152,40 +152,8 @@ def convert_encoding(source)
           raise TypeError, "#{source.inspect} is not like a string"
         end
         if defined?(::Encoding)
-          if source.encoding == ::Encoding::ASCII_8BIT
-            b = source[0, 4].bytes.to_a
-            source =
-              case
-              when b.size >= 4 && b[0] == 0 && b[1] == 0 && b[2] == 0
-                source.dup.force_encoding(::Encoding::UTF_32BE).encode!(::Encoding::UTF_8)
-              when b.size >= 4 && b[0] == 0 && b[2] == 0
-                source.dup.force_encoding(::Encoding::UTF_16BE).encode!(::Encoding::UTF_8)
-              when b.size >= 4 && b[1] == 0 && b[2] == 0 && b[3] == 0
-                source.dup.force_encoding(::Encoding::UTF_32LE).encode!(::Encoding::UTF_8)
-              when b.size >= 4 && b[1] == 0 && b[3] == 0
-                source.dup.force_encoding(::Encoding::UTF_16LE).encode!(::Encoding::UTF_8)
-              else
-                source.dup
-              end
-          else
-            source = source.encode(::Encoding::UTF_8)
-          end
+          source = source.encode(::Encoding::UTF_8)
           source.force_encoding(::Encoding::ASCII_8BIT)
-        else
-          b = source
-          source =
-            case
-            when b.size >= 4 && b[0] == 0 && b[1] == 0 && b[2] == 0
-              JSON.iconv('utf-8', 'utf-32be', b)
-            when b.size >= 4 && b[0] == 0 && b[2] == 0
-              JSON.iconv('utf-8', 'utf-16be', b)
-            when b.size >= 4 && b[1] == 0 && b[2] == 0 && b[3] == 0
-              JSON.iconv('utf-8', 'utf-32le', b)
-            when b.size >= 4 && b[1] == 0 && b[3] == 0
-              JSON.iconv('utf-8', 'utf-16le', b)
-            else
-              b
-            end
         end
         source
       end