Fix build; remove launchpad_sdk

Change-Id: Ib99d2396f4b70b3d933549a4ab44f671b3f1500c
diff --git a/fuchsia/BUILD.gn b/fuchsia/BUILD.gn
index e9ba4cb..a69a1d4 100644
--- a/fuchsia/BUILD.gn
+++ b/fuchsia/BUILD.gn
@@ -12,7 +12,6 @@
     "//garnet/public/sdk:zircon_sysroot_export",
     "//third_party/vulkan_loader_and_validation_layers:vulkan",
     "//zircon/public/lib/fdio:fdio_sdk",
-    "//zircon/public/lib/launchpad:launchpad_sdk",
   ]
 
   depfile = "$root_out_dir/build-vulkancts/vulkan-cts.d"