upcall: Remove unneeded variable insize

Remove unneeded variable insize in venus_pioctl().

Signed-off-by: Xu Wang <vulab@iscas.ac.cn>

fs/coda/upcall.c

@@ -477,10 +477,9 @@ int venus_pioctl(struct super_block *sb, struct CodaFid *fid,
 {
         union inputArgs *inp;
         union outputArgs *outp;  
-	int insize, outsize, error;
+	int outsize, error;
 	int iocsize;
 
-	insize = VC_MAXMSGSIZE;
 	UPARG(CODA_IOCTL);
 
         /* build packet for Venus */