Remove obsolete output from test.

Author: David Ungar

test/Serialization/vtable-function-deserialization.swift

@@ -1,5 +1,5 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-swift-frontend -emit-module -o Swift.swiftmodule -O -sil-inline-threshold 0 -module-name Swift -module-link-name swiftCore -parse-as-library -parse-stdlib -emit-module %S/Inputs/vtable-function-deserialization-input.swift -o %t/Swift.swiftmodule
+// RUN: %target-swift-frontend -emit-module -O -sil-inline-threshold 0 -module-name Swift -module-link-name swiftCore -parse-as-library -parse-stdlib -emit-module %S/Inputs/vtable-function-deserialization-input.swift -o %t/Swift.swiftmodule
 // RUN: %target-swift-frontend -I %t %s -emit-sil -o - -O -sil-link-all
 
 import Swift