LibCore: Remove DateTime::to_string() and to_byte_string()

Author: https://github.com/tomaszstrejczek
Commit: 7278a17e87
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5096
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/R-Goc
Reviewed-by: https://github.com/gmta

Libraries/LibCore/DateTime.h

@@ -33,42 +33,6 @@ public:
     void set_time_only(int hour, int minute, Optional<int> second = {});
     void set_date(Core::DateTime const& other);
 
-    enum class LocalTime {
-        Yes,
-        No,
-    };
-
-    // %a:      require short day name
-    // %A:      require long day name
-    // %h/b:    require short month name
-    // %B:      require long month name
-    // %C:      require short year number (hundreds) (ex: 19 -> 1900)
-    // %d:      require day number
-    // %D:      require month number/day number/short year number (ex: 12/31/24)
-    // %e:      require day number
-    // %H:      require hour (24h format)
-    // %I:      require hour (12h format)
-    // %j:      require defining date with day number ? (not sure)
-    // %m:      require set to month entred - 1
-    // %M:      require minutes
-    // %n:      require newline
-    // %t:      require tab
-    // %r/p:    require AM | PM
-    // %R:      require hours:minutes (ex: 13:57)
-    // %S:      require seconds
-    // %T:      require hours:minutes:seconds (ex: 13:57:34)
-    // %w:      require week day number
-    // %y:      require 2 digits year (69 < year < 99: in the 1900 else in 2000)
-    // %Y:      require full year
-    // %z:      require timezone hours:minutes or single number to represent hour and minutes
-    // %x:      require single number to represent hour and minutes
-    // %X:      require sub second precision
-    // %Z:      require timezone name
-    // %+:      ignore until next '%'
-    // %%:      require character '%'
-    ErrorOr<String> to_string(StringView format = "%Y-%m-%d %H:%M:%S"sv, LocalTime = LocalTime::Yes) const;
-    ByteString to_byte_string(StringView format = "%Y-%m-%d %H:%M:%S"sv, LocalTime = LocalTime::Yes) const;
-
     static DateTime create(int year, int month = 1, int day = 1, int hour = 0, int minute = 0, int second = 0);
     static DateTime now();
     static DateTime from_timestamp(time_t);