configs: stm32f746-disco: remove a useless comment

Commit 8fc78fc73b7f9d ("configs: migrate CONFIG_BMP_16/24/32BPP to defconfigs")
made the comment useless.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/include/configs/stm32f746-disco.h b/include/configs/stm32f746-disco.h
index 34856d3..9bf01ca 100644
--- a/include/configs/stm32f746-disco.h
+++ b/include/configs/stm32f746-disco.h
@@ -36,6 +36,4 @@
 #define CFG_SYS_UBOOT_BASE		(CFG_SYS_FLASH_BASE + \
 					 CONFIG_SPL_PAD_TO)
 
-/* For splashcreen */
-
 #endif /* __CONFIG_H */