[Volatile] Drop the Embedded testrun from test/Volatile/volatile-feature-flag.swift

Author: kubamracek

test/Volatile/volatile-feature-flag.swift

@@ -1,7 +1,6 @@
 // RUN: %empty-directory(%t)
 // RUN: not %target-swift-emit-ir %s -module-name main -parse-as-library 2>&1 | %FileCheck %s
 // RUN: %target-swift-emit-ir %s -module-name main -parse-as-library -enable-experimental-feature Volatile
-// RUN: %target-swift-emit-ir %s -module-name main -parse-as-library -enable-experimental-feature Embedded
 
 import _Volatile