staging: rtl8188eu: remove redundant assignment to variable rtstatus

Variable rtstatus is being initialized with a value that is never read
and rtstatus is being re-assigned a little later on. The assignment is
redundant and hence can be removed.  Also, make rtstatus a bool to
match the function return type.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20190731094736.28637-1-colin.king@canonical.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/hal/bb_cfg.c

@@ -653,7 +653,7 @@ static bool config_parafile(struct adapter *adapt)
 
 bool rtl88eu_phy_bb_config(struct adapter *adapt)
 {
-	int rtstatus = true;
+	bool rtstatus;
 	u32 regval;
 	u8 crystal_cap;