diff --git a/src/mainboard/google/brox/Kconfig b/src/mainboard/google/brox/Kconfig
index dcd1705..2b4038c 100644
--- a/src/mainboard/google/brox/Kconfig
+++ b/src/mainboard/google/brox/Kconfig
@@ -149,8 +149,4 @@
 	int
 	default 33
 
-config VBT_DATA_SIZE_KB
-	int
-	default 10
-
 endif # BOARD_GOOGLE_BROX_COMMON
diff --git a/src/mainboard/google/brya/Kconfig b/src/mainboard/google/brya/Kconfig
index 3bfc17d..757cfc4 100644
--- a/src/mainboard/google/brya/Kconfig
+++ b/src/mainboard/google/brya/Kconfig
@@ -795,8 +795,4 @@
 	int
 	default 33
 
-config VBT_DATA_SIZE_KB
-	int
-	default 10 if BOARD_GOOGLE_PIRRHA
-
 endif # BOARD_GOOGLE_BRYA_COMMON