[PATCH] libgloss: doc: fix @direntry definition

@direntry automatically generates START/END-INFO-DIR-ENTRY. Specifying
them again in the source causes install-info to choke on the resulting
info file:

   install-info: START-INFO-DIR-ENTRY without matching END-INFO-DIR-ENTRY
---
  libgloss/doc/porting.texi | 2 --
  1 file changed, 2 deletions(-)

diff --git a/libgloss/doc/porting.texi b/libgloss/doc/porting.texi
index 1f68757be..dd5e29e41 100644
--- a/libgloss/doc/porting.texi
+++ b/libgloss/doc/porting.texi
@@ -50,9 +50,7 @@ into another language, under the above conditions for modified versions.
  @end titlepage

  @direntry
-START-INFO-DIR-ENTRY
  * Embed with GNU: (porting-).         Embed with GNU
-END-INFO-DIR-ENTRY
  @end direntry

  @ifnottex
-- 
2.49.0