s390/head64: cleanup unused labels

Cleanup labels in head64 some of which are not being used since git
recorded history.

Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

arch/s390/kernel/head64.S

@@ -60,12 +60,5 @@ ENTRY(startup_continue)
 
 	.align	16
 .LPG1:
-.Lpcmsk:.quad	0x0000000180000000
-.L4malign:.quad 0xffffffffffc00000
-.Lscan2g:.quad	0x80000000 + 0x20000 - 8	# 2GB + 128K - 8
-.Lnop:	.long	0x07000700
-.Lparmaddr:
-	.quad	PARMAREA
-	.align	64
 .Ldw:	.quad	0x0002000180000000,0x0000000000000000
 .Laregs:.long	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0