eeprom: idt_89hpesx: remove unneeded csr_file variable

The csr_file variable was only ever set, never read.  So remove it from
struct idt_89hpesx_dev as it is pointless to keep around.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/eeprom/idt_89hpesx.c

@@ -115,7 +115,6 @@ static struct dentry *csr_dbgdir;
  * @client:	i2c client used to perform IO operations
  *
  * @ee_file:	EEPROM read/write sysfs-file
- * @csr_file:	CSR read/write debugfs-node
  */
 struct idt_smb_seq;
 struct idt_89hpesx_dev {
@@ -137,7 +136,6 @@ struct idt_89hpesx_dev {
 
 	struct bin_attribute *ee_file;
 	struct dentry *csr_dir;
-	struct dentry *csr_file;
 };
 
 /*
@@ -1378,8 +1376,8 @@ static void idt_create_dbgfs_files(struct idt_89hpesx_dev *pdev)
 	pdev->csr_dir = debugfs_create_dir(fname, csr_dbgdir);
 
 	/* Create Debugfs file for CSR read/write operations */
-	pdev->csr_file = debugfs_create_file(cli->name, 0600,
-		pdev->csr_dir, pdev, &csr_dbgfs_ops);
+	debugfs_create_file(cli->name, 0600, pdev->csr_dir, pdev,
+			    &csr_dbgfs_ops);
 }
 
 /*