drop "select GCD" from three Kconfig files

There is no Kconfig symbol named GCD. The three select statements for
that symbol are nops. Drop these.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

arch/mips/Kconfig

@@ -65,7 +65,6 @@ config AR7
 	select SYS_SUPPORTS_LITTLE_ENDIAN
 	select SYS_SUPPORTS_ZBOOT_UART16550
 	select ARCH_REQUIRE_GPIOLIB
-	select GCD
 	select VLYNQ
 	help
 	  Support for the Texas Instruments AR7 System-on-a-Chip

net/netfilter/ipvs/Kconfig

@@ -122,7 +122,6 @@ config	IP_VS_RR
  
 config	IP_VS_WRR
 	tristate "weighted round-robin scheduling"
-	select GCD
 	---help---
 	  The weighted robin-robin scheduling algorithm directs network
 	  connections to different real servers based on server weights

sound/core/Kconfig

@@ -5,7 +5,6 @@ config SND_TIMER
 config SND_PCM
 	tristate
 	select SND_TIMER
-	select GCD
 
 config SND_HWDEP
 	tristate