fpga: dfl: remove unused function is_dfl_feature_present()

The function is_dfl_feature_present() was added but never used.

Fixes: 5b57d02a2f94 ("fpga: dfl: add feature device infrastructure")
Signed-off-by: Peter Colberg <[e-mail]>
Reviewed-by: Matthew Gerlach <[e-mail]>
Acked-by: Xu Yilun <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Xu Yilun <[e-mail]>

drivers/fpga/dfl.h

···
 	return NULL;
 }
 
-static inline bool is_dfl_feature_present(struct device *dev, u16 id)
-{
-	return !!dfl_get_feature_ioaddr_by_id(dev, id);
-}
-
 static inline
 struct device *dfl_fpga_pdata_to_parent(struct dfl_feature_platform_data *pdata)
 {