Remove code sign from stdlib/Error.swift

Author: shahmishal

test/stdlib/Error.swift

@@ -1,6 +1,5 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-build-swift -o %t/Error -DPTR_SIZE_%target-ptrsize -module-name main %/s
-// RUN: %target-codesign %t/Error
 // RUN: %target-run %t/Error
 // REQUIRES: executable_test