dm: Drop unused driver model config_defaults

These are now in Kconfig so we can drop them from the header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/config_defaults.h b/include/config_defaults.h
index fa99838..ad08c1d 100644
--- a/include/config_defaults.h
+++ b/include/config_defaults.h
@@ -20,16 +20,4 @@
 #define CONFIG_ZLIB 1
 #define CONFIG_PARTITIONS 1
 
-#ifndef CONFIG_SPL_BUILD
-#ifndef CONFIG_DM_WARN
-#define CONFIG_DM_WARN
-#endif
-#ifndef CONFIG_DM_DEVICE_REMOVE
-#define CONFIG_DM_DEVICE_REMOVE
-#endif
-#ifndef CONFIG_DM_STDIO
-#define CONFIG_DM_STDIO
-#endif
-#endif
-
 #endif