data/pandoc.lua: drop function pandoc.global_filter

The function `global_filter` was used internally to get the implicitly
defined global filter. It was of little value to end-users, but caused
unnecessary code duplication in pandoc. The function has hence been
dropped. Internally, the global filter is now received by interpreting
the global table as lua filter.

This is a Lua API change.

1 files changed, 0 insertions, 19 deletions

diff --git a/doc/lua-filters.md b/doc/lua-filters.md
index afa9b939f..10dca0dce 100644
--- a/doc/lua-filters.md
+++ b/doc/lua-filters.md
@@ -1325,25 +1325,6 @@ Lua functions for pandoc scripts.
 
 ## Helper Functions
 
-[`global_filter ()`]{#global_filter}
-
-:   Use functions defined in the global namespace to create a
-    pandoc filter.
-
-    Returns: A list of filter functions
-
-    Usage:
-
-        -- within a file defining a pandoc filter:
-        text = require 'text'
-        function Str(elem)
-          return pandoc.Str(text.upper(elem.text))
-        end
-
-        return {pandoc.global_filter()}
-        -- the above is equivalent to
-        -- return {{Str = Str}}
-
 [`pipe (command, args, input)`]{#pipe}
 
 :   Runs command with arguments, passing it some input, and