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/stale-block.yaml

@@ -1,28 +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: Stale Block
-
-    summary_max_255_characters_no_formatting: >
-        Blocks which were successfully mined but which aren't included
-        on the current best block chain, likely because some other block
-        at the same height had its chain extended first.
-
-    synonyms_shown_in_glossary_capitalize_first_letter:
-        - Stale block
-
-optional:
-    synonyms_and_pluralizations_not_shown_in_glossary:
-        - stale blocks
-
-    not_to_be_confused_with_capitalize_first_letter:
-        - Orphan block (a block whose previous (parent) hash field points to an unknown block, meaning the orphan can't be validated)
-
-    links_html_or_markdown_style_capitalize_first_letter:
-        - "[Stale blocks](/en/developer-guide#term-stale-block) --- Bitcoin.org Developer Guide"
-        - "[What are orphaned and stale blocks?](http://bitcoin.stackexchange.com/q/5859) --- Bitcoin StackExchange"
-
----