Don't exit with not implemented error on latch clock data

Since RTC is not implemented yet but some games that use RTC still work
without a full implementation (such as Pokemon) it is better to just
issue a warning here as a reminder instead of refusing to work.

src/game-boy-emulator/mbc3.cpp

@@ -86,7 +86,7 @@ void Mbc3::write_registers(uint16_t address, uint8_t value) {
         }
     } else if (memmap::is_in(address, memmap::BankingModeSelect)) {
         // Latch clock data if previous write was 0x0 and this write was 0x1
-        throw NotImplementedError("Unimplemented: Latch clock data");
+        get_logger()->warn("Latch clock data not implemented");
     }
     //    get_logger()->debug("Cartridge registers: RAMG {}, BANK1 {:05B}, BANK2 {:02b}, MODE
     //    {:1B}",