remove compiler constraint from tests

Author: stefanomondino

Tests/AsyncAlgorithmsTests/TestShare.swift

@@ -9,8 +9,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#if compiler(>=6.0)
-
 import XCTest
 import AsyncAlgorithms
 import Synchronization
@@ -608,5 +606,3 @@ final class TestShare: XCTestCase {
 private enum TestError: Error, Equatable {
   case failure
 }
-
-#endif