mlx5: remove unused MLX5_DEBUG param in Kconfig

This patch proposes to remove the MLX5_DEBUG kernel configuration
parameter defined in drivers/net/ethernet/mellanox/mlx5/core/Kconfig,
but used nowhere in the makefiles and source code.

This could also be fixed by using this parameter,
but this may be a leftover from driver development...
Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx5/core/Kconfig

@@ -6,13 +6,3 @@ config MLX5_CORE
 	tristate
 	depends on PCI && X86
 	default n
-
-config MLX5_DEBUG
-	bool "Verbose debugging output" if (MLX5_CORE && EXPERT)
-	depends on MLX5_CORE
-	default y
-	---help---
-	  This option causes debugging code to be compiled into the
-	  mlx5_core driver.  The output can be turned on via the
-	  debug_mask module parameter (which can also be set after
-	  the driver is loaded through sysfs).