docs: kdoc: remove a bit of dead code

The type_param regex matches "@..." just fine, so the special-case branch
for that in dump_section() is never executed.  Just remove it.

Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20250627184000.132291-4-corbet@lwn.net

scripts/lib/kdoc/kdoc_parser.py

@@ -207,13 +207,6 @@ class KernelEntry:
             self.sectcheck += name + " "
             self.new_start_line = 0
 
-        elif name == "@...":
-            name = "..."
-            self.parameterdescs[name] = contents
-            self.sectcheck += name + " "
-            self.parameterdesc_start_lines[name] = self.new_start_line
-            self.new_start_line = 0
-
         else:
             if name in self.sections and self.sections[name] != "":
                 # Only warn on user-specified duplicate section names