Remove extraneous /-es from license comments. (#37655)

Co-authored-by: Chris Adamson <[email protected]>

Author: invalidname

stdlib/public/Concurrency/Errors.swift

@@ -1,14 +1,14 @@
-////===----------------------------------------------------------------------===//
-////
-//// This source file is part of the Swift.org open source project
-////
-//// Copyright (c) 2020 Apple Inc. and the Swift project authors
-//// Licensed under Apache License v2.0 with Runtime Library Exception
-////
-//// See https://swift.org/LICENSE.txt for license information
-//// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
-////
-////===----------------------------------------------------------------------===//
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2020 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
 
 import Swift
 @_implementationOnly import _SwiftConcurrencyShims

stdlib/public/core/EitherSequence.swift

@@ -1,14 +1,14 @@
-////===--- _EitherSequence.swift - A sequence type-erasing two sequences -----===//
-////
-//// This source file is part of the Swift.org open source project
-////
-//// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
-//// Licensed under Apache License v2.0 with Runtime Library Exception
-////
-//// See https://swift.org/LICENSE.txt for license information
-//// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
-////
-////===----------------------------------------------------------------------===//
+//===--- _EitherSequence.swift - A sequence type-erasing two sequences -----===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
 
 // Not public stdlib API, currently used in Mirror.children implementation.