staging: rtl8188eu: Remove unnecessary variables

Remove unnecessary variable that can be replaced with a single line
of code.

The semantic patch used to find this is:

// <smpl>
@@
expression ret;
@@
- if (ret) return ret;
- return 0;
+ return ret;

@@
local idexpression ret;
expression e;
@@
- ret = e;
- return ret;
+ return e;

@@
type T;
identifier i;
expression E;
@@
- T i = E;
 ... when != i

@@
type T;
identifier i;
@@
- T i;
 ... when != i
// </smpl>

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/hal/fw.c

@@ -190,7 +190,6 @@ int rtl88eu_download_fw(struct adapter *adapt)
 	struct rtl92c_firmware_header *pfwheader = NULL;
 	u8 *pfwdata;
 	u32 fwsize;
-	int err;
 
 	if (request_firmware(&fw, fw_name, device)) {
 		dev_err(device, "Firmware %s not available\n", fw_name);
@@ -229,7 +228,5 @@ int rtl88eu_download_fw(struct adapter *adapt)
 	_rtl88e_write_fw(adapt, pfwdata, fwsize);
 	_rtl88e_enable_fw_download(adapt, false);
 
-	err = _rtl88e_fw_free_to_go(adapt);
-
-	return err;
+	return _rtl88e_fw_free_to_go(adapt);
 }