extcon: sm5502: remove redundant assignment to variable cable_type

The variable cable_type is being initialized with a value that
is never read and is being re-assigned a little later on. The
assignment is redundant and hence can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

drivers/extcon/extcon-sm5502.c

@@ -276,7 +276,7 @@ static int sm5502_muic_set_path(struct sm5502_muic_info *info,
 /* Return cable type of attached or detached accessories */
 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
 {
-	unsigned int cable_type = -1, adc, dev_type1;
+	unsigned int cable_type, adc, dev_type1;
 	int ret;
 
 	/* Read ADC value according to external cable or button */