submodel choice for qemu targets got removed

mk/build.mk

@@ -475,12 +475,6 @@ endif
 			|sed -e "s#^config \(.*\)#\1=y#" \
 			>> $(ADK_TOPDIR)/.defconfig; \
 	fi
-	@if [ ! -z "$(ADK_TARGET_QEMU)" ];then \
-		grep "^config" target/config/Config.in.qemu \
-			|grep -i "$(ADK_TARGET_QEMU)" \
-			|sed -e "s#^config \(.*\)#\1=y#" \
-			>> $(ADK_TOPDIR)/.defconfig; \
-	fi
 	@if [ ! -z "$(ADK_APPLIANCE)" ];then \
 		$(CONFIG)/conf --defconfig=.defconfig $(CONFIG_CONFIG_IN); \
 	fi