uClibc-0.9.29: remove double ARM subarch selection from defconfig

uclibc.mk unconditionally adds the ARM subarch config entries to the
config so remove them from the defconfig.

toolchain/uClibc/uClibc-0.9.29.config

@@ -200,20 +200,4 @@ WARNINGS="-Wall"
 # UCLIBC_MJN3_ONLY is not set
 
 # USE_BX is not set
-# CONFIG_GENERIC_ARM is not set
-# CONFIG_ARM610 is not set
-# CONFIG_ARM710 is not set
-# CONFIG_ARM7TDMI is not set
-# CONFIG_ARM720T is not set
-# CONFIG_ARM920T is not set
-# CONFIG_ARM922T is not set
-# CONFIG_ARM926T is not set
-# CONFIG_ARM10T is not set
-# CONFIG_ARM1136JF_S is not set
-# CONFIG_ARM1176JZ_S is not set
-# CONFIG_ARM1176JZF_S is not set
-# CONFIG_ARM_SA110 is not set
-# CONFIG_ARM_SA1100 is not set
-# CONFIG_ARM_XSCALE is not set
-# CONFIG_ARM_IWMMXT is not set