device/device.h: Drop unused function declaration

The `dev_optimize()` function is neither defined nor used anywhere in
the tree. Drop its unnecessary declaration.

Change-Id: I902bda3244c6496a04f364fad3ecbbdd118dd543
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57398
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/include/device/device.h

@@ -175,7 +175,6 @@ void dev_enumerate(void);
 void dev_configure(void);
 void dev_enable(void);
 void dev_initialize(void);
-void dev_optimize(void);
 void dev_finalize(void);
 void dev_finalize_chips(void);
 /* Function used to override device state */