Remove broxygen Sphinx integration

The broxygen-generated files now live in the git repo, have tests
that check that they are up-to-date, and a script to re-generate
them on-demand.

doc/scripts/base/bif/plugins/Bro_FileExtract.events.bif.bro.rst

@@ -0,0 +1,50 @@
+:tocdepth: 3
+
+base/bif/plugins/Bro_FileExtract.events.bif.bro
+===============================================
+.. bro:namespace:: GLOBAL
+
+
+:Namespace: GLOBAL
+
+Summary
+~~~~~~~
+Events
+######
+================================================== ================================================================
+:bro:id:`file_extraction_limit`: :bro:type:`event` This event is generated when a file extraction analyzer is about
+                                                   to exceed the maximum permitted file size allowed by the
+                                                   *extract_limit* field of :bro:see:`Files::AnalyzerArgs`.
+================================================== ================================================================
+
+
+Detailed Interface
+~~~~~~~~~~~~~~~~~~
+Events
+######
+.. bro:id:: file_extraction_limit
+
+   :Type: :bro:type:`event` (f: :bro:type:`fa_file`, args: :bro:type:`Files::AnalyzerArgs`, limit: :bro:type:`count`, len: :bro:type:`count`)
+
+   This event is generated when a file extraction analyzer is about
+   to exceed the maximum permitted file size allowed by the
+   *extract_limit* field of :bro:see:`Files::AnalyzerArgs`.
+   The analyzer is automatically removed from file *f*.
+   
+
+   :f: The file.
+   
+
+   :args: Arguments that identify a particular file extraction analyzer.
+         This is only provided to be able to pass along to
+         :bro:see:`FileExtract::set_limit`.
+   
+
+   :limit: The limit, in bytes, the extracted file is about to breach.
+   
+
+   :len: The length of the file chunk about to be written.
+   
+   .. bro:see:: Files::add_analyzer Files::ANALYZER_EXTRACT
+
+