Remove legacy canImport(_Concurrency) checks

Author: freak4pc

RxCocoa/Traits/SharedSequence/SharedSequence+Concurrency.swift

@@ -6,7 +6,7 @@
 //  Copyright © 2021 Krunoslav Zaher. All rights reserved.
 //
 
-#if swift(>=5.6) && canImport(_Concurrency)
+#if swift(>=5.7)
 import Foundation
 
 // MARK: - Shared Sequence

RxSwift/Observable+Concurrency.swift

@@ -6,7 +6,7 @@
 //  Copyright © 2021 Krunoslav Zaher. All rights reserved.
 //
 
-#if swift(>=5.6) && canImport(_Concurrency)
+#if swift(>=5.7)
 import Foundation
 
 @available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)

RxSwift/Traits/Infallible/Infallible+Concurrency.swift

@@ -6,7 +6,7 @@
 //  Copyright © 2021 Krunoslav Zaher. All rights reserved.
 //
 
-#if swift(>=5.6) && canImport(_Concurrency)
+#if swift(>=5.7)
 // MARK: - Infallible
 
 @available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)

RxSwift/Traits/PrimitiveSequence/PrimitiveSequence+Concurrency.swift

@@ -8,7 +8,7 @@
 
 import Foundation
 
-#if swift(>=5.6) && canImport(_Concurrency)
+#if swift(>=5.7)
 @available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
 public extension PrimitiveSequenceType where Trait == SingleTrait {
     /**

Tests/RxCocoaTests/SharedSequence+ConcurrencyTests.swift

@@ -6,7 +6,7 @@
 //  Copyright © 2021 Krunoslav Zaher. All rights reserved.
 //
 
-#if swift(>=5.6) && canImport(_Concurrency)
+#if swift(>=5.7)
 import Dispatch
 import RxCocoa
 import RxSwift

Tests/RxSwiftTests/Infallible+ConcurrencyTests.swift

@@ -6,7 +6,7 @@
 //  Copyright © 2021 Krunoslav Zaher. All rights reserved.
 //
 
-#if swift(>=5.6) && canImport(_Concurrency)
+#if swift(>=5.7)
 import Dispatch
 import RxSwift
 import RxTest

Tests/RxSwiftTests/Observable+ConcurrencyTests.swift

@@ -6,7 +6,7 @@
 //  Copyright © 2021 Krunoslav Zaher. All rights reserved.
 //
 
-#if swift(>=5.6) && canImport(_Concurrency)
+#if swift(>=5.7)
 import Dispatch
 import RxSwift
 import RxTest

Tests/RxSwiftTests/PrimitiveSequence+ConcurrencyTests.swift

@@ -6,7 +6,7 @@
 //  Copyright © 2021 Krunoslav Zaher. All rights reserved.
 //
 
-#if swift(>=5.6) && canImport(_Concurrency)
+#if swift(>=5.7)
 import Dispatch
 import RxBlocking
 import RxSwift