py/mpprint: Remove unused "PF_FLAG_NO_TRAILZ" flag.

Looking at the git history, there's no indication that the
`PF_FLAG_NO_TRAILZ` flag was ever implemented or that "%!" was used as an
`mp_printf` format string in practice.

So remove the flag and re-number the other flags.

Leave `PF_FLAG_SEP_POS` at 9 (the highest position that probably works with
16-bit integers like the pic16bit port).

Signed-off-by: Jeff Epler <[email protected]>

Author: jepler

py/mpprint.c

@@ -413,8 +413,6 @@ int mp_vprintf(const mp_print_t *print, const char *fmt, va_list args) {
                 flags |= PF_FLAG_SHOW_SIGN;
             } else if (*fmt == ' ') {
                 flags |= PF_FLAG_SPACE_SIGN;
-            } else if (*fmt == '!') {
-                flags |= PF_FLAG_NO_TRAILZ;
             } else if (*fmt == '0') {
                 flags |= PF_FLAG_PAD_AFTER_SIGN;
                 fill = '0';

py/mpprint.h

@@ -31,12 +31,11 @@
 #define PF_FLAG_LEFT_ADJUST       (0x001)
 #define PF_FLAG_SHOW_SIGN         (0x002)
 #define PF_FLAG_SPACE_SIGN        (0x004)
-#define PF_FLAG_NO_TRAILZ         (0x008)
-#define PF_FLAG_SHOW_PREFIX       (0x010)
-#define PF_FLAG_PAD_AFTER_SIGN    (0x020)
-#define PF_FLAG_CENTER_ADJUST     (0x040)
-#define PF_FLAG_ADD_PERCENT       (0x080)
-#define PF_FLAG_SHOW_OCTAL_LETTER (0x100)
+#define PF_FLAG_SHOW_PREFIX       (0x008)
+#define PF_FLAG_PAD_AFTER_SIGN    (0x010)
+#define PF_FLAG_CENTER_ADJUST     (0x020)
+#define PF_FLAG_ADD_PERCENT       (0x040)
+#define PF_FLAG_SHOW_OCTAL_LETTER (0x080)
 #define PF_FLAG_SEP_POS           (9) // must be above all the above PF_FLAGs
 
 #if MICROPY_PY_IO && MICROPY_PY_SYS_STDFILES