Remove FORMAT_CONV_MAX_PRECISION

This used to be necessary in the past because the NUM_BUF_SIZE
was set to 512, which is shorter than DOUBLE_MAX_LENGTH. Now the
value is either DOUBLE_MAX_LENGTH or larger (2048).

main/snprintf.c

@@ -582,10 +582,6 @@ static size_t format_converter(buffy * odp, const char *fmt, va_list ap) /* {{{
 							precision = 0;
 					} else
 						precision = 0;
-
-					if (precision > FORMAT_CONV_MAX_PRECISION) {
-						precision = FORMAT_CONV_MAX_PRECISION;
-					}
 				} else
 					adjust_precision = false;
 			} else

main/snprintf.h

@@ -133,15 +133,4 @@ PHPAPI char * ap_php_conv_10(int64_t num, bool is_unsigned,
 PHPAPI char * ap_php_conv_p2(uint64_t num, int nbits,
 		 char format, char *buf_end, size_t *len);
 
-/* The maximum precision that's allowed for float conversion. Does not include
- * decimal separator, exponent, sign, terminator. Currently does not affect
- * the modes e/f, only g/k/H, as those have a different limit enforced at
- * another level (see NDIG in php_conv_fp()).
- * Applies to the formatting functions of both spprintf.c and snprintf.c, which
- * use equally sized buffers of MAX_BUF_SIZE = 512 to hold the result of the
- * call to zend_gcvt().
- * This should be reasonably smaller than MAX_BUF_SIZE (I think MAX_BUF_SIZE - 9
- * should be enough, but let's give some more space) */
-#define FORMAT_CONV_MAX_PRECISION 500
-
 #endif /* SNPRINTF_H */

main/spprintf.c

@@ -289,10 +289,6 @@ static void xbuf_format_converter(void *xbuf, bool is_char, const char *fmt, va_
 							precision = -1;
 					} else
 						precision = 0;
-
-					if (precision > FORMAT_CONV_MAX_PRECISION) {
-						precision = FORMAT_CONV_MAX_PRECISION;
-					}
 				} else
 					adjust_precision = false;
 			} else