Remove markers for tech review queries.

Author: amartini51

stdlib/public/Concurrency/TaskGroup.swift

@@ -373,7 +373,6 @@ public struct TaskGroup<ChildTaskResult> {
   ///
   /// There are no restrictions on where you can call this method.
   /// Code inside a child task or even another task can cancel a group.
-  /// ◊TR: Is this rewrite too strong?
   ///
   /// - SeeAlso: `Task.isCancelled`
   /// - SeeAlso: `TaskGroup.isCancelled`
@@ -388,8 +387,6 @@ public struct TaskGroup<ChildTaskResult> {
   /// If the task that's currently running this group is canceled,
   /// the group is also implicitly canceled,
   /// which is also reflected in this property's value.
-  /// ◊TR: Why do we have two implementations of this method?
-  /// ◊TR: What's the difference between them?
   public var isCancelled: Bool {
     return _taskGroupIsCancelled(group: _group)
   }
@@ -669,7 +666,6 @@ public struct ThrowingTaskGroup<ChildTaskResult, Failure: Error> {
   ///
   /// There are no restrictions on where you can call this method.
   /// Code inside a child task or even another task can cancel a group.
-  /// ◊TR: Is this rewrite too strong?
   ///
   /// - SeeAlso: `Task.isCancelled`
   /// - SeeAlso: `ThrowingTaskGroup.isCancelled`
@@ -684,8 +680,6 @@ public struct ThrowingTaskGroup<ChildTaskResult, Failure: Error> {
   /// If the task that's currently running this group is canceled,
   /// the group is also implicitly canceled,
   /// which is also reflected in this property's value.
-  /// ◊TR: Why do we have two implementations of this method?
-  /// ◊TR: What's the difference between them?
   public var isCancelled: Bool {
     return _taskGroupIsCancelled(group: _group)
   }

stdlib/public/Concurrency/TaskSleep.swift

@@ -16,8 +16,6 @@ import Swift
 extension Task where Success == Never, Failure == Never {
   /// Suspends the current task for at least the given duration
   /// in nanoseconds.
-  /// ◊TR: Why do we have both sleep(_:) and sleep(nanoseconds:) -- what's the difference between them?
-  /// ◊TR: It looks like only sleep(nanoseconds:) throws.
   ///
   /// This function doesn't block the underlying thread.
   public static func sleep(_ duration: UInt64) async {