diff --git a/src/include/config.h.in b/src/include/config.h.in
index f8836576cfecbedc693703a34c93f590c772f3e4..44752346b517a1a8ad7350afeac08f6c92215b50 100644
--- a/src/include/config.h.in
+++ b/src/include/config.h.in
@@ -291,12 +291,6 @@ extern void srandom(int seed);
 
 /* #define DATEDEBUG */
 
-/*
- * Define this if you want to use date constants with a short year
- * like '01/05/96'.
- */
-/* #define USE_SHORT_YEAR */
-
 /*
  * defining unsafe floats's will make float4 and float8
  * ops faster at the cost of safety, of course!        
@@ -320,15 +314,6 @@ extern void srandom(int seed);
  */
 #define TCL_ARRAYS
 
-/*
- * The comparison routines for text and char data type give incorrect results
- * if the input data contains characters greater than 127.  As these routines
- * perform the comparison using signed char variables all character codes
- * greater than 127 are interpreted as less than 0.  These codes are used to
- * encode the iso8859 char sets.  Define this flag to correct the problem.
- */
-#define UNSIGNED_CHAR_TEXT
-
 /*
  * The following flag allows limiting the number of rows returned by a query.
  * You will need the loadable module utils.c to use this feature.
@@ -360,11 +345,6 @@ extern void srandom(int seed);
 #define RTDEBUG 
 #define GISTDEBUG 
 /* #define DEBUG_RECIPE */
-/* #define ASYNC_DEBUG */
-/* #define COPY_DEBUG */
-/* #define VACUUM_DEBUG */
-/* #define NBTINSERT_PATCH_DEBUG */
-
 
 /* The following don't have any apparent purpose, but are in the
  * code.  someday, will take them out altogether, but for now,