qemu-options: Remove deprecated option -clock

The option is only a dummy since a long time. We've finally deprecated
it in QEMU v3.0, so it's time to remove it now.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <1549545296-18903-3-git-send-email-thuth@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

qemu-deprecated.texi

@@ -37,11 +37,6 @@ would automatically enable USB support on the machine type.
 If using the new syntax, USB support must be explicitly
 enabled via the ``-machine usb=on'' argument.
 
-@subsection -clock (since 3.0.0)
-
-The @code{-clock} option is ignored since QEMU version 1.7.0. There is no
-replacement since it is not needed anymore.
-
 @subsection -drive file=json:@{...@{'driver':'file'@}@} (since 3.0)
 
 The 'file' driver for drives is no longer appropriate for character or host

qemu-options.hx

@@ -3444,9 +3444,6 @@ Load the contents of @var{file} as an option ROM.
 This option is useful to load things like EtherBoot.
 ETEXI
 
-HXCOMM Silently ignored for compatibility
-DEF("clock", HAS_ARG, QEMU_OPTION_clock, "", QEMU_ARCH_ALL)
-
 DEF("rtc", HAS_ARG, QEMU_OPTION_rtc, \
     "-rtc [base=utc|localtime|<datetime>][,clock=host|rt|vm][,driftfix=none|slew]\n" \
     "                set the RTC base and clock, enable drift fix for clock ticks (x86 only)\n",

vl.c

@@ -3735,12 +3735,6 @@ int main(int argc, char **argv, char **envp)
             case QEMU_OPTION_old_param:
                 old_param = 1;
                 break;
-            case QEMU_OPTION_clock:
-                /* Clock options no longer exist.  Keep this option for
-                 * backward compatibility.
-                 */
-                warn_report("This option is ignored and will be removed soon");
-                break;
             case QEMU_OPTION_rtc:
                 opts = qemu_opts_parse_noisily(qemu_find_opts("rtc"), optarg,
                                                false);