[PATCH] Remove unused variable `command-debug-status'

[Philippe Vaucher <philippe.vaucher@gmail.com>]

Hello,

This is my first attempt at submitting a patch, so keep that in mind
in case I messed up somewhere.

I already did the copyright assignment dance and it was accepted &
sent to me the 2016-09-07, do I need to send the confirmation to
someone in order to post here?

Just to be sure, I should send emails to emacs-devel as plain text
right? no html?

Anyway, back to the subject: this patch removes the variable
`command-debug-status', which really seems to be unused since a long
time to me (that's what "git -G Vcommand-debug-status" says).

I fell on it while looking to solve another problem (which will be
discussed in another email).

Thanks,
Philippe

---
 doc/lispref/debugging.texi | 12 ------------
 src/callint.c              |  6 ------
 2 files changed, 18 deletions(-)

diff --git a/doc/lispref/debugging.texi b/doc/lispref/debugging.texi
index 2f83b40..f4e63ae 100644
--- a/doc/lispref/debugging.texi
+++ b/doc/lispref/debugging.texi
@@ -644,18 +644,6 @@ the debugger.
 This function is used only by the debugger.
 @end defun

-@defvar command-debug-status
-This variable records the debugging status of the current interactive
-command.  Each time a command is called interactively, this variable is
-bound to @code{nil}.  The debugger can set this variable to leave
-information for future debugger invocations during the same command
-invocation.
-
-The advantage of using this variable rather than an ordinary global
-variable is that the data will never carry over to a subsequent command
-invocation.
-@end defvar
-
 @defun backtrace-frame frame-number
 The function @code{backtrace-frame} is intended for use in Lisp
 debuggers.  It returns information about what computation is happening
diff --git a/src/callint.c b/src/callint.c
index 053ee6c..ccb5c6a 100644
--- a/src/callint.c
+++ b/src/callint.c
@@ -928,12 +928,6 @@ Maximum length of the history list is determined
by the value
 of `history-length', which see.  */);
   Vcommand_history = Qnil;

-  DEFVAR_LISP ("command-debug-status", Vcommand_debug_status,
-       doc: /* Debugging status of current interactive command.
-Bound each time `call-interactively' is called;
-may be set by the debugger as a reminder for itself.  */);
-  Vcommand_debug_status = Qnil;
-
   DEFVAR_LISP ("mark-even-if-inactive", Vmark_even_if_inactive,
        doc: /* Non-nil means you can use the mark even when inactive.
 This option makes a difference in Transient Mark mode.
-- 
2.10.0