test: remove methods usage not supported on linux

Author: soumyamahunt

Tests/AsyncObjectTests/XCTestCase.swift

@@ -1,4 +1,5 @@
 import XCTest
+import Dispatch
 
 extension XCTestCase {
     func checkExecInterval(
@@ -7,22 +8,11 @@ extension XCTestCase {
     ) async rethrows {
         let time = DispatchTime.now()
         try await task()
-        let execTime = time.distance(to: DispatchTime.now())
-        switch execTime {
-        case .seconds(let value):
-            XCTAssertEqual(seconds, value)
-        case .microseconds(let value):
-            XCTAssertEqual(seconds, value / Int(1E6))
-        case .milliseconds(let value):
-            XCTAssertEqual(seconds, value / Int(1E3))
-        case .nanoseconds(let value):
-            XCTAssertEqual(seconds, value / Int(1E9))
-        case .never: fallthrough
-        @unknown default:
-            NSException(
-                name: NSExceptionName(rawValue: "UnExpectedInterval"),
-                reason: "UnExpected time interval"
-            ).raise()
-        }
+        XCTAssertEqual(
+            seconds,
+            Int(
+                DispatchTime.now().uptimeNanoseconds - time.uptimeNanoseconds
+            ) / Int(1E9)
+        )
     }
 }