[NET]: Unexport dev_ethtool

This patch removes the no longer used EXPORT_SYMBOL(dev_ethtool).
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/ethtool.c

@@ -948,7 +948,6 @@ int dev_ethtool(struct ifreq *ifr)
 	return rc;
 }
 
-EXPORT_SYMBOL(dev_ethtool);
 EXPORT_SYMBOL(ethtool_op_get_link);
 EXPORT_SYMBOL(ethtool_op_get_sg);
 EXPORT_SYMBOL(ethtool_op_get_tso);