Remove win_vulkan_sdk.

We only needed this for the Vulkan headers, which we now have in
src/third_party.

Change-Id: I453ed73c73b3304520b628527102607d848bcd37
Reviewed-on: https://skia-review.googlesource.com/c/180775
Commit-Queue: Greg Daniel <egdaniel@google.com>
Auto-Submit: Ben Wagner <benjaminwagner@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
diff --git a/infra/bots/gen_tasks.go b/infra/bots/gen_tasks.go
index 50f8db2..38d9ea2 100644
--- a/infra/bots/gen_tasks.go
+++ b/infra/bots/gen_tasks.go
@@ -30,16 +30,15 @@
 )
 
 const (
-	BUNDLE_RECIPES_NAME         = "Housekeeper-PerCommit-BundleRecipes"
-	ISOLATE_GCLOUD_LINUX_NAME   = "Housekeeper-PerCommit-IsolateGCloudLinux"
-	ISOLATE_GO_DEPS_NAME        = "Housekeeper-PerCommit-IsolateGoDeps"
-	ISOLATE_SKIMAGE_NAME        = "Housekeeper-PerCommit-IsolateSkImage"
-	ISOLATE_SKP_NAME            = "Housekeeper-PerCommit-IsolateSKP"
-	ISOLATE_SVG_NAME            = "Housekeeper-PerCommit-IsolateSVG"
-	ISOLATE_NDK_LINUX_NAME      = "Housekeeper-PerCommit-IsolateAndroidNDKLinux"
-	ISOLATE_SDK_LINUX_NAME      = "Housekeeper-PerCommit-IsolateAndroidSDKLinux"
-	ISOLATE_WIN_TOOLCHAIN_NAME  = "Housekeeper-PerCommit-IsolateWinToolchain"
-	ISOLATE_WIN_VULKAN_SDK_NAME = "Housekeeper-PerCommit-IsolateWinVulkanSDK"
+	BUNDLE_RECIPES_NAME        = "Housekeeper-PerCommit-BundleRecipes"
+	ISOLATE_GCLOUD_LINUX_NAME  = "Housekeeper-PerCommit-IsolateGCloudLinux"
+	ISOLATE_GO_DEPS_NAME       = "Housekeeper-PerCommit-IsolateGoDeps"
+	ISOLATE_SKIMAGE_NAME       = "Housekeeper-PerCommit-IsolateSkImage"
+	ISOLATE_SKP_NAME           = "Housekeeper-PerCommit-IsolateSKP"
+	ISOLATE_SVG_NAME           = "Housekeeper-PerCommit-IsolateSVG"
+	ISOLATE_NDK_LINUX_NAME     = "Housekeeper-PerCommit-IsolateAndroidNDKLinux"
+	ISOLATE_SDK_LINUX_NAME     = "Housekeeper-PerCommit-IsolateAndroidSDKLinux"
+	ISOLATE_WIN_TOOLCHAIN_NAME = "Housekeeper-PerCommit-IsolateWinToolchain"
 
 	DEFAULT_OS_DEBIAN    = "Debian-9.4"
 	DEFAULT_OS_LINUX_GCE = DEFAULT_OS_DEBIAN
@@ -731,10 +730,6 @@
 		cipdPkg: "win_toolchain",
 		path:    "win_toolchain",
 	},
-	ISOLATE_WIN_VULKAN_SDK_NAME: {
-		cipdPkg: "win_vulkan_sdk",
-		path:    "win_vulkan_sdk",
-	},
 }
 
 // isolateCIPDAsset generates a task to isolate the given CIPD asset.
@@ -883,9 +878,6 @@
 		if strings.Contains(name, "Clang") {
 			task.CipdPackages = append(task.CipdPackages, b.MustGetCipdPackageFromAsset("clang_win"))
 		}
-		if strings.Contains(name, "Vulkan") {
-			task.Dependencies = append(task.Dependencies, isolateCIPDAsset(b, ISOLATE_WIN_VULKAN_SDK_NAME))
-		}
 		if strings.Contains(name, "OpenCL") {
 			task.CipdPackages = append(task.CipdPackages,
 				b.MustGetCipdPackageFromAsset("opencl_headers"),