ARM: omap1: remove unused variable

The cleanup of the debugfs functions left one variable behind that
should now be removed as well:

arch/arm/mach-omap1/clock.c:1008:6: error: unused variable 'err' [-Werror,-Wunused-variable]

Fixes: d5ddd5a ("arm: omap1: no need to check return value of debugfs_create functions")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/arm/mach-omap1/clock.c

@@ -1005,7 +1005,6 @@ static void clk_debugfs_register_one(struct clk *c)
 
 static void clk_debugfs_register(struct clk *c)
 {
-	int err;
 	struct clk *pa = c->parent;
 
 	if (pa && !pa->dent)