Removed unused code

Fix linter error in CI

discover/vulkan_common.go

@@ -1,19 +0,0 @@
-package discover
-
-import (
-	"log/slog"
-	"strings"
-)
-
-func vkGetVisibleDevicesEnv(gpuInfo []GpuInfo) (string, string) {
-	ids := []string{}
-	for _, info := range gpuInfo {
-		if info.Library != "vulkan" {
-			// TODO shouldn't happen if things are wired correctly...
-			slog.Debug("vkGetVisibleDevicesEnv skipping over non-vulkan device", "library", info.Library)
-			continue
-		}
-		ids = append(ids, info.ID)
-	}
-	return "GGML_VK_VISIBLE_DEVICES", strings.Join(ids, ",")
-}