[test] Remove uses of -enable-experimental-async-top-level

This is no longer experimental and is the default.

Author: hamishknight

test/Concurrency/toplevel/async-5-top-level.swift

@@ -1,9 +1,8 @@
-// RUN: %target-swift-frontend -typecheck -target %target-swift-5.1-abi-triple -enable-experimental-async-top-level -swift-version 5 %s -verify
+// RUN: %target-swift-frontend -typecheck -target %target-swift-5.1-abi-triple -swift-version 5 %s -verify
 
-// enable-experimental-async-top-level is passed and an await is used in the
-// top-level, so the top-level code is a concurrent context. Variables are
-// declared with `@_predatesConcurrency @MainActor`, and the top-level is run on
-// the main actor.
+// An await is used in the top-level, so the top-level code is a concurrent
+// context. Variables are declared with `@_predatesConcurrency @MainActor`, and
+// the top-level is run on the main actor.
 
 var a = 10 // expected-note {{mutation of this var is only permitted within the actor}}
 

test/Concurrency/toplevel/async-6-top-level.swift

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -typecheck -target %target-swift-5.1-abi-triple -enable-experimental-async-top-level -swift-version 6 %s -verify
+// RUN: %target-swift-frontend -typecheck -target %target-swift-5.1-abi-triple -swift-version 6 %s -verify
 
 var a = 10
 // expected-note@-1 2 {{var declared here}}

test/Concurrency/toplevel/main.swift

@@ -1,8 +1,8 @@
 // RUN: %empty-directory(%t)
 // RUN: split-file --leading-lines %s %t
 
-// RUN: %target-swift-frontend -typecheck -verify %t/main.swift %t/foo.swift -enable-experimental-async-top-level -swift-version 6 -verify-additional-prefix swift6-
-// RUN: %target-swift-frontend -typecheck -verify %t/main.swift %t/foo.swift -enable-experimental-async-top-level -swift-version 5 -verify-additional-prefix swift5-
+// RUN: %target-swift-frontend -typecheck -verify %t/main.swift %t/foo.swift -swift-version 6 -verify-additional-prefix swift6-
+// RUN: %target-swift-frontend -typecheck -verify %t/main.swift %t/foo.swift -swift-version 5 -verify-additional-prefix swift5-
 
 //--- foo.swift
 func foo() -> Int {

test/Concurrency/toplevel/no-async-5-top-level.swift

@@ -1,9 +1,7 @@
-// RUN: %target-swift-frontend -typecheck -target %target-swift-5.1-abi-triple -enable-experimental-async-top-level -swift-version 5 %s -verify
 // RUN: %target-swift-frontend -typecheck -target %target-swift-5.1-abi-triple -swift-version 5 %s -verify
 
-// Even though enable-experimental-async-top-level is enabled, there are no
-// `await`s made from the top-level, so it is not an async context. `a` is just
-// a normal top-level global variable with no actor isolation.
+// There are no `await`s made from the top-level, so it is not an async context.
+// `a` is just a normal top-level global variable with no actor isolation.
 
 var a = 10
 

test/Concurrency/toplevel/no-async-6-top-level.swift

@@ -1,9 +1,8 @@
 // RUN: %target-swift-frontend -typecheck -target %target-swift-5.1-abi-triple -swift-version 6 %s -verify
 
-// Even though enable-experimental-async-top-level is enabled, there are no
-// 'await's made from the top-level, thus the top-level is not an asynchronous
-// context. `a` is just a normal top-level global variable with no actor
-// isolation.
+// There are no 'await's made from the top-level, thus the top-level is not an
+// asynchronous context. `a` is just a normal top-level global variable with no
+// actor isolation.
 
 var a = 10 // expected-note 2 {{var declared here}}
 // expected-note@-1 2{{mutation of this var is only permitted within the actor}}

test/Concurrency/toplevel/synchronous_mainactor.swift

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -enable-experimental-async-top-level -strict-concurrency=complete -typecheck -verify %s
+// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -strict-concurrency=complete -typecheck -verify %s
 
 var a = 10 // expected-note{{var declared here}}
 

test/SILGen/top_level_captures.swift

@@ -1,5 +1,4 @@
 // RUN: %target-swift-frontend -emit-silgen %s | %FileCheck %s
-// RUN: %target-swift-frontend -enable-experimental-async-top-level -emit-silgen %s | %FileCheck %s
 // RUN: %target-swift-frontend -experimental-skip-non-inlinable-function-bodies -experimental-skip-non-inlinable-function-bodies-without-types -emit-silgen %s | %FileCheck -check-prefix=SKIPPED-FUNC-EMITTED %s
 
 guard let x: Int = nil else { while true { } }

test/SILGen/toplevel.swift

@@ -1,5 +1,4 @@
 // RUN: %target-swift-emit-silgen -Xllvm -sil-print-types -Xllvm -sil-full-demangle %s | %FileCheck %s
-// RUN: %target-swift-emit-silgen -Xllvm -sil-print-types -Xllvm -sil-full-demangle -enable-experimental-async-top-level %s | %FileCheck %s
 
 func markUsed<T>(_ t: T) {}
 

test/SILGen/toplevel_errors.swift

@@ -1,5 +1,4 @@
 // RUN: %target-swift-emit-silgen -Xllvm -sil-print-types %s | %FileCheck %s
-// RUN: %target-swift-emit-silgen -Xllvm -sil-print-types -enable-experimental-async-top-level %s | %FileCheck %s
 
 enum MyError : Error {
   case A, B

test/SILGen/toplevel_globalactorvars.swift

@@ -1,4 +1,4 @@
-// RUN: %target-swift-emit-silgen -Xllvm -sil-print-types -Xllvm -sil-full-demangle -target %target-swift-5.1-abi-triple -enable-experimental-async-top-level %s | %FileCheck %s
+// RUN: %target-swift-emit-silgen -Xllvm -sil-print-types -Xllvm -sil-full-demangle -target %target-swift-5.1-abi-triple %s | %FileCheck %s
 
 // a
 // CHECK-LABEL: sil_global hidden @$s24toplevel_globalactorvars1aSivp : $Int