10 files changed, 2 insertions, 43 deletions

diff --git a/admin/admin.el b/admin/admin.el
index c84287a7024..fececc86a4b 100644
--- a/admin/admin.el
+++ b/admin/admin.el
@@ -124,9 +124,6 @@ Root must be the root of an Emacs source tree."
   ;; Major version only.
   (when (string-match "\\([0-9]\\{2,\\}\\)" version)
     (let ((newmajor (match-string 1 version)))
-      (set-version-in-file root "src/msdos.c" newmajor
-                           (rx (and "Vwindow_system_version" (1+ not-newline)
-                                    ?\( (submatch (1+ (in "0-9"))) ?\))))
       (set-version-in-file root "etc/refcards/ru-refcard.tex" newmajor
                            "\\\\newcommand{\\\\versionemacs}\\[0\\]\
 {\\([0-9]\\{2,\\}\\)}.+%.+version of Emacs")))
diff --git a/etc/NEWS b/etc/NEWS
index 9aafbbcab4e..c77d275ba7a 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -2574,8 +2574,8 @@ but switching to `ash` is generally much preferable.
 'url-recreate-url-attributes', 'user-variable-p',
 'vc-string-prefix-p', 'vc-toggle-read-only', 'view-return-to-alist',
 'view-return-to-alist-update', 'w32-default-color-map' (function),
-'which-func-mode' (function), 'winner-mode-leave-hook',
-'x-cut-buffer-or-selection-value'.
+'which-func-mode' (function), 'window-system-version',
+'winner-mode-leave-hook', 'x-cut-buffer-or-selection-value'.
 
 ---
 ** Some functions and variables obsolete since Emacs 23 have been removed:
diff --git a/lisp/frame.el b/lisp/frame.el
index 9361683c28a..ae8449d0ea8 100644
--- a/lisp/frame.el
+++ b/lisp/frame.el
@@ -3050,10 +3050,6 @@ See also `toggle-frame-maximized'."
 
 (make-variable-buffer-local 'show-trailing-whitespace)
 
-;; Defined in dispnew.c.
-(make-obsolete-variable
- 'window-system-version "it does not give useful information." "24.3")
-
 (defun set-frame-property--interactive (prompt number)
   "Get a value for `set-frame-width' or `set-frame-height', prompting with PROMPT.
 Offer NUMBER as default value, if it is a natural number."
diff --git a/lisp/textmodes/artist.el b/lisp/textmodes/artist.el
index 2cf9ded04bf..76675328daa 100644
--- a/lisp/textmodes/artist.el
+++ b/lisp/textmodes/artist.el
@@ -5341,8 +5341,6 @@ The event, EV, is the mouse event."
   (require 'reporter)
   (if (y-or-n-p "Do you want to submit a bug report on Artist? ")
       (let ((vars '(window-system
-                    window-system-version
-                    ;;
                     artist-rubber-banding
                     artist-interface-with-rect
                     artist-aspect-ratio
diff --git a/src/dispnew.c b/src/dispnew.c
index 53a47c4b2f2..8932f103f1f 100644
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -6504,9 +6504,6 @@ init_display_interactive (void)
   if (!inhibit_window_system && display_arg)
     {
       Vinitial_window_system = Qx;
-#ifdef HAVE_X11
-      Vwindow_system_version = make_fixnum (11);
-#endif
 #ifdef USE_NCURSES
       /* In some versions of ncurses,
          tputs crashes if we have not called tgetent.
@@ -6521,7 +6518,6 @@ init_display_interactive (void)
   if (!inhibit_window_system)
     {
       Vinitial_window_system = Qw32;
-      Vwindow_system_version = make_fixnum (1);
       return;
     }
 #endif /* HAVE_NTGUI */
@@ -6530,7 +6526,6 @@ init_display_interactive (void)
   if (!inhibit_window_system && !will_dump_p ())
     {
       Vinitial_window_system = Qns;
-      Vwindow_system_version = make_fixnum (10);
       return;
     }
 #endif
@@ -6539,7 +6534,6 @@ init_display_interactive (void)
   if (!inhibit_window_system && !will_dump_p ())
     {
       Vinitial_window_system = Qpgtk;
-      Vwindow_system_version = make_fixnum (3);
       return;
     }
 #endif
@@ -6548,7 +6542,6 @@ init_display_interactive (void)
   if (!inhibit_window_system && !will_dump_p ())
     {
       Vinitial_window_system = Qhaiku;
-      Vwindow_system_version = make_fixnum (1);
       return;
     }
 #endif
@@ -6766,10 +6759,6 @@ Use of this variable as a boolean is deprecated.  Instead,
 use `display-graphic-p' or any of the other `display-*-p'
 predicates which report frame's specific UI-related capabilities.  */);
 
-  DEFVAR_LISP ("window-system-version", Vwindow_system_version,
-               doc: /* The version number of the window system in use.
-For X windows, this is 11.  */);
-
   DEFVAR_BOOL ("cursor-in-echo-area", cursor_in_echo_area,
                doc: /* Non-nil means put cursor in minibuffer, at end of any message there.  */);
 
@@ -6817,5 +6806,4 @@ static void
 syms_of_display_for_pdumper (void)
 {
   Vinitial_window_system = Qnil;
-  Vwindow_system_version = Qnil;
 }
diff --git a/src/msdos.c b/src/msdos.c
index 1608245904c..1d3fdd528d7 100644
--- a/src/msdos.c
+++ b/src/msdos.c
@@ -1794,7 +1794,6 @@ internal_terminal_init (void)
         }
 
       Vinitial_window_system = Qpc;
-      Vwindow_system_version = make_fixnum (29); /* RE Emacs version */
       tty->terminal->type = output_msdos_raw;
 
       /* If Emacs was dumped on DOS/V machine, forget the stale VRAM
diff --git a/src/nsterm.m b/src/nsterm.m
index e3f47eb905e..4db78fb48cc 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -5605,17 +5605,6 @@ ns_term_init (Lisp_Object display_name)
 
   NSTRACE_MSG ("Versions");
 
-  {
-#ifdef NS_IMPL_GNUSTEP
-    Vwindow_system_version = build_string (gnustep_base_version);
-#else
-    /* PSnextrelease (128, c); */
-    char c[DBL_BUFSIZE_BOUND];
-    int len = dtoastr (c, sizeof c, 0, 0, NSAppKitVersionNumber);
-    Vwindow_system_version = make_unibyte_string (c, len);
-#endif
-  }
-
   delete_keyboard_wait_descriptor (0);
 
   ns_app_name = [[NSProcessInfo processInfo] processName];
diff --git a/src/pgtkfns.c b/src/pgtkfns.c
index beaf28f69d9..9473e14f5cf 100644
--- a/src/pgtkfns.c
+++ b/src/pgtkfns.c
@@ -164,8 +164,6 @@ pgtk_display_info_for_name (Lisp_Object name)
   if (dpyinfo == 0)
     error ("Cannot connect to display server %s", SDATA (name));
 
-  XSETFASTINT (Vwindow_system_version, 11);
-
   return dpyinfo;
 }
 
diff --git a/src/w32fns.c b/src/w32fns.c
index 28d13a68d45..745458d0a03 100644
--- a/src/w32fns.c
+++ b/src/w32fns.c
@@ -6699,8 +6699,6 @@ w32_display_info_for_name (Lisp_Object name)
   if (dpyinfo == 0)
     error ("Cannot connect to server %s", SDATA (name));
 
-  XSETFASTINT (Vwindow_system_version, w32_major_version);
-
   return dpyinfo;
 }
 
@@ -6781,7 +6779,6 @@ DEFUN ("x-open-connection", Fx_open_connection, Sx_open_connection,
         error ("Cannot connect to server %s", SDATA (display));
     }
 
-  XSETFASTINT (Vwindow_system_version, w32_major_version);
   return Qnil;
 }
 
diff --git a/src/xfns.c b/src/xfns.c
index a275e3e11a8..922fd5a6d46 100644
--- a/src/xfns.c
+++ b/src/xfns.c
@@ -7228,8 +7228,6 @@ x_display_info_for_name (Lisp_Object name)
   if (dpyinfo == 0)
     error ("Cannot connect to X server %s", SDATA (name));
 
-  XSETFASTINT (Vwindow_system_version, 11);
-
   return dpyinfo;
 }
 
@@ -7273,7 +7271,6 @@ An insecure way to solve the problem may be to use `xhost'.\n",
         error ("Cannot connect to X server %s", SDATA (display));
     }
 
-  XSETFASTINT (Vwindow_system_version, 11);
   return Qnil;
 }