lib.systems.riscv-multiplatform: drop linux-kernel.extraConfig

SERIAL_OF_PLATFORM has been y in riscv defconfig since 2018

Reference: https://github.com/torvalds/linux/commit/33c57c0d3c67f51f491a9d27108f7e97adc03d96

1 files changed, 0 insertions, 3 deletions

diff --git a/lib/systems/platforms.nix b/lib/systems/platforms.nix
index c8951534ae90e..403ffc028f0be 100644
--- a/lib/systems/platforms.nix
+++ b/lib/systems/platforms.nix
@@ -538,9 +538,6 @@ rec {
       preferBuiltin = true;
       baseConfig = "defconfig";
       DTB = true;
-      extraConfig = ''
-        SERIAL_OF_PLATFORM y
-      '';
     };
   };