x86/cpu: Remove Makefile rule for removed UMC CPU support

Support for UMC CPUs was removed in

  7d328c5 ("x86/cpu: Remove CPU_SUP_UMC_32 support"),

but a Makefile rule for the support code remained. Remove it.

Fixes: 7d328c5 ("x86/cpu: Remove CPU_SUP_UMC_32 support")
Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Ahmed S. Darwish <darwi@linutronix.de>
Link: https://patch.msgid.link/20260610033252.164571-1-enelsonmoore@gmail.com

Author: EthanNelson-Moore

arch/x86/kernel/cpu/Makefile

@@ -46,7 +46,6 @@ obj-$(CONFIG_CPU_SUP_HYGON)		+= hygon.o
 obj-$(CONFIG_CPU_SUP_CYRIX_32)		+= cyrix.o
 obj-$(CONFIG_CPU_SUP_CENTAUR)		+= centaur.o
 obj-$(CONFIG_CPU_SUP_TRANSMETA_32)	+= transmeta.o
-obj-$(CONFIG_CPU_SUP_UMC_32)		+= umc.o
 obj-$(CONFIG_CPU_SUP_ZHAOXIN)		+= zhaoxin.o
 obj-$(CONFIG_CPU_SUP_VORTEX_32)		+= vortex.o