char: pcmcia: cm4040_cs: Remove unused variable 'uc'

Fixes the following W=1 kernel build warning(s):

 drivers/char/pcmcia/cm4040_cs.c: In function ‘cm4040_read’:
 drivers/char/pcmcia/cm4040_cs.c:224:16: warning: variable ‘uc’ set but not used [-Wunused-but-set-variable]

Cc: Harald Welte <laforge@gnumonks.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210520121347.3467794-3-lee.jones@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/char/pcmcia/cm4040_cs.c

@@ -221,7 +221,6 @@ static ssize_t cm4040_read(struct file *filp, char __user *buf,
 	unsigned long i;
 	size_t min_bytes_to_read;
 	int rc;
-	unsigned char uc;
 
 	DEBUGP(2, dev, "-> cm4040_read(%s,%d)\n", current->comm, current->pid);
 
@@ -308,7 +307,7 @@ static ssize_t cm4040_read(struct file *filp, char __user *buf,
 			return -EIO;
 	}
 
-	uc = xinb(iobase + REG_OFFSET_BULK_IN);
+	xinb(iobase + REG_OFFSET_BULK_IN);
 
 	DEBUGP(2, dev, "<- cm4040_read (successfully)\n");
 	return min_bytes_to_read;