[loader] remove roller staging target

Test: CQ, built dependent fuchsia changes locally
Change-Id: Ib026edc89715d3a6884fa5972780481dc57161fe
diff --git a/loader/BUILD.gn b/loader/BUILD.gn
index a9aba08..1b58ad8 100644
--- a/loader/BUILD.gn
+++ b/loader/BUILD.gn
@@ -130,11 +130,3 @@
     ]
   }
 }
-
-# Temporary roller staging
-shared_library("loader_linux") {
-  output_name = "vulkan_linux"
-  deps = [
-    ":loader_static",
-  ]
-}