Bug#1093963: obsolete patch

[YumeYao]

Source: llvm-toolchain-19
Version: 19.1.7-1

protobuf_3.21.patch is obsolete.
This patch was intended to change from
JsonStatus.code()
to
(int)JsonStatus.code()

Now upstream has fixed it in an alternate way by using
static_cast<int>(JsonStatus.code())
which is just another syntax of c++ conversion.

So we don't need to keep this patch any more.

Best Regards,
yumeyao