kvmfr: fix build failure for B7-rc1

pkgs/os-specific/linux/kvmfr/default.nix

@@ -6,9 +6,6 @@ stdenv.mkDerivation {
 
   src = looking-glass-client.src;
   sourceRoot = "${looking-glass-client.src.name}/module";
-  patches = lib.optional (kernel.kernelAtLeast "6.4") [
-    ./linux-6-4-compat.patch
-  ];
   hardeningDisable = [ "pic" "format" ];
   nativeBuildInputs = kernel.moduleBuildDependencies;
 

pkgs/os-specific/linux/kvmfr/linux-6-4-compat.patch

@@ -1,16 +0,0 @@
-diff --git a/kvmfr.c b/kvmfr.c
-index 121aae5b..2f4c9e1a 100644
---- a/kvmfr.c
-+++ b/kvmfr.c
-@@ -539,7 +539,11 @@ static int __init kvmfr_module_init(void)
-   if (kvmfr->major < 0)
-     goto out_free;
- 
-+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 4, 0)
-   kvmfr->pClass = class_create(THIS_MODULE, KVMFR_DEV_NAME);
-+#else
-+  kvmfr->pClass = class_create(KVMFR_DEV_NAME);
-+#endif
-   if (IS_ERR(kvmfr->pClass))
-     goto out_unreg;
-