Remove hardcoded merging of :code_type.

      h[:aliases] = build_aliases_hash(h[:aliases] || [])

      # Used by Aggregator to determine if we're dealing with Ext4 code

      h[:code_type] = code[:code_type] if code[:code_type]

      h[:enum] = merge_enum(docs, code) if docs[:enum]

      h[:members] = []