PCDs not used by modules or in conditional directives
sections of all the build reports for
{AARCH64,ARM} x {Qemu,QemuKernel,Xen} x {RELEASE} x {feat-0,feat-1}
(12 builds in total), the PCD is not used in any of those builds.
Rather than just restrict the PCD setting to ($(TARGET) != RELEASE),
remove the setting completely. The current value is identical to the 0xAF
default in "MdePkg/MdePkg.dec", which recognizes Andrew Fish, and so it's
unlikely to ever change.
("feat-1" stands for "-D HTTP_BOOT_ENABLE -D NETWORK_IP6_ENABLE -D
SECURE_BOOT_ENABLE -D TTY_TERMINAL", while "feat-0" stands for "".)