gfsc100_defconfig: Use the SLUB allocator instead of SLAB

Google-Bug-Id: 24470466

Change-Id: I6a17efc4d4308a564bfa688cc779a84ebc64611a
diff --git a/arch/arm/configs/gfsc100_defconfig b/arch/arm/configs/gfsc100_defconfig
index ae2b05a..9c00fa7 100644
--- a/arch/arm/configs/gfsc100_defconfig
+++ b/arch/arm/configs/gfsc100_defconfig
@@ -19,7 +19,6 @@
 CONFIG_PRINTK_PERSIST=y
 CONFIG_BOOTLOG_COPY=y
 # CONFIG_COMPAT_BRK is not set
-CONFIG_SLAB=y
 CONFIG_PROFILING=y
 CONFIG_OPROFILE=m
 CONFIG_MODULES=y