Remove immediate_quit.

The old code that sets and clears immediate_quit was
ineffective except when Emacs is running in terminal mode, and
has problematic race conditions anyway, so remove it.  This
will introduce some hangs when Emacs runs in terminal mode,
and these hangs should be fixed in followup patches.
* src/keyboard.c (immediate_quit): Remove.  All uses removed.

1 files changed, 2 insertions, 3 deletions

diff --git a/admin/notes/multi-tty b/admin/notes/multi-tty
index b58180e6fab..d0096adc6d2 100644
--- a/admin/notes/multi-tty
+++ b/admin/notes/multi-tty
@@ -1239,9 +1239,8 @@ DIARY OF CHANGES
    (Update: OK, it all seems so easy now (NOT).  Input could be done
    synchronously (with wait_reading_process_input), or asynchronously
    by SIGIO or polling (SIGALRM).  C-g either sets the Vquit_flag,
-   signals a 'quit condition (when immediate_quit), or throws to
-   'getcjmp' when Emacs was waiting for input when the C-g event
-   arrived.)
+   signals a 'quit condition, or throws to 'getcjmp' when Emacs was
+   waiting for input when the C-g event arrived.)
 
 -- Replace wrong_kboard_jmpbuf with a special return value of
    read_char.  It is absurd that we use setjmp/longjmp just to return