docs: kdoc: remove KernelEntry::function

This member is unused, to take it out.

Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20250627184000.132291-5-corbet@lwn.net

scripts/lib/kdoc/kdoc_parser.py

@@ -129,7 +129,6 @@ class KernelEntry:
         self.config = config
 
         self._contents = []
-        self.function = ""
         self.sectcheck = ""
         self.struct_actual = ""
         self.prototype = ""