Revert "Merge pull #793: Dev Docs: New Glossary & JS Search Box"

This reverts commit e3dcf0ce1f, reversing
changes made to c71e9fdf2d.

Once again we had a broken new plugin that Travis CI and local building
didn't catch.

_data/glossary/en/serialized-block.yaml

@@ -1,30 +0,0 @@
----
-# This file is licensed under the MIT License (MIT) available on
-# http://opensource.org/licenses/MIT.
-
-required:
-                                           #-------------40 characters-------------#
-    title_max_40_characters_no_formatting: Serialized Block, Raw Block
-
-    summary_max_255_characters_no_formatting: >
-        A complete block in its binary format---the same format used to
-        calculate total block byte size; often represented using
-        hexadecimal.
-
-    synonyms_shown_in_glossary_capitalize_first_letter:
-        - Serialized block
-
-optional:
-    synonyms_and_pluralizations_not_shown_in_glossary:
-        - serialized blocks
-        - raw blocks
-        - raw format block
-        - raw format blocks
-
-    not_to_be_confused_with_capitalize_first_letter:
-
-    links_html_or_markdown_style_capitalize_first_letter:
-        - "[Serialized blocks](/en/developer-reference#serialized-blocks) --- Bitcoin.org Developer Reference"
-        - "[Block message (serialized block)](https://en.bitcoin.it/wiki/Protocol_documentation#block) --- Bitcoin Wiki"
-
----