[test] Replace obsolete single_threaded_runtime feature with threading_none

The feature was renamed in 0cf687a but
validation tests were not updated at that time.

Author: kateinoigakukun

validation-test/Runtime/ConcurrentMetadata.swift

@@ -1,6 +1,5 @@
 // RUN: %target-run-simple-swift
 // REQUIRES: executable_test
-// UNSUPPORTED: single_threaded_runtime
 // UNSUPPORTED: threading_none
 
 // Exercise the metadata cache from multiple threads to shake out any

validation-test/Runtime/weak-reference-racetests.swift

@@ -1,7 +1,7 @@
 // RUN: %target-run-simple-swift
 // REQUIRES: executable_test
 // REQUIRES: stress_test
-// UNSUPPORTED: single_threaded_runtime
+// UNSUPPORTED: threading_none
 
 import StdlibUnittest
 

validation-test/SILOptimizer/string_switch.swift

@@ -5,7 +5,7 @@
 // REQUIRES: swift_stdlib_no_asserts,optimized_stdlib
 // REQUIRES: stress_test
 // REQUIRES: executable_test
-// UNSUPPORTED: single_threaded_runtime
+// UNSUPPORTED: threading_none
 
 import StdlibUnittest
 

validation-test/StdlibUnittest/AtomicInt.swift

@@ -5,7 +5,7 @@
 // RUN: %target-run %t.out
 // REQUIRES: executable_test
 // REQUIRES: stress_test
-// UNSUPPORTED: single_threaded_runtime
+// UNSUPPORTED: threading_none
 
 import SwiftPrivate
 import StdlibUnittest

validation-test/StdlibUnittest/RaceTest.swift

@@ -2,7 +2,7 @@
 // RUN: %target-build-swift -Xfrontend -disable-access-control -module-name a %s -o %t.out
 // RUN: %target-run %t.out | %FileCheck %s
 // REQUIRES: stress_test
-// UNSUPPORTED: single_threaded_runtime
+// UNSUPPORTED: threading_none
 
 import SwiftPrivate
 import StdlibUnittest

validation-test/stdlib/ArrayBridging.swift

@@ -10,7 +10,7 @@
 // REQUIRES: objc_interop
 // REQUIRES: executable_test
 // REQUIRES: stress_test
-// UNSUPPORTED: single_threaded_runtime
+// UNSUPPORTED: threading_none
 
 import StdlibUnittest
 import Foundation

validation-test/stdlib/CommandLine.swift

@@ -8,7 +8,7 @@
 // RUN: %target-run %t/CommandLineStressTest foo bar baz qux quux corge grault garply waldo fred plugh xyzzy and thud
 // REQUIRES: executable_test
 // REQUIRES: stress_test
-// UNSUPPORTED: single_threaded_runtime
+// UNSUPPORTED: threading_none
 
 // REQUIRES: rdar70423908
 

validation-test/stdlib/DictionaryBridging.swift

@@ -9,7 +9,7 @@
 // REQUIRES: stress_test
 
 // REQUIRES: objc_interop
-// UNSUPPORTED: single_threaded_runtime
+// UNSUPPORTED: threading_none
 
 import StdlibUnittest
 import Foundation

validation-test/stdlib/ErrorProtocol.swift

@@ -2,7 +2,7 @@
 // REQUIRES: executable_test
 // REQUIRES: stress_test
 // REQUIRES: objc_interop
-// UNSUPPORTED: single_threaded_runtime
+// UNSUPPORTED: threading_none
 
 import SwiftPrivate
 import StdlibUnittest