Staging: slicoss: fix build warnings

This fixes some build warnings in the slicoss driver.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/slicoss/slicoss.c b/drivers/staging/slicoss/slicoss.c
index 0999126..ed47db5 100644
--- a/drivers/staging/slicoss/slicoss.c
+++ b/drivers/staging/slicoss/slicoss.c
@@ -1872,7 +1872,6 @@
 	__iomem struct slic_regs *slic_regs = adapter->slic_regs;
 	u32 instruction;
 	u32 baseaddress;
-	u32 failure;
 	u32 i;
 	u32 numsects = 0;
 	u32 sectsize[3];