Bring back Task-related remark removals that got re-added in the last docs porting. (#8060)

Co-authored-by: carlossanlop <[email protected]>

Author: carlossanlop

xml/System.Runtime.CompilerServices/TaskAwaiter.xml

@@ -61,15 +61,7 @@
   </Attributes>
   <Docs>
     <summary>Provides an object that waits for the completion of an asynchronous task.</summary>
-    <remarks>
-      <format type="text/markdown"><![CDATA[
-
-## Remarks
-
-This type is intended for compiler use only.
-
-      ]]></format>
-    </remarks>
+    <remarks>To be added.</remarks>
   </Docs>
   <Members>
     <Member MemberName="GetResult">
@@ -116,7 +108,7 @@ This type is intended for compiler use only.
       <Parameters />
       <Docs>
         <summary>Ends the wait for the completion of the asynchronous task.</summary>
-        <remarks />
+        <remarks>To be added.</remarks>
         <exception cref="T:System.NullReferenceException">The <see cref="T:System.Runtime.CompilerServices.TaskAwaiter" /> object was not properly initialized.</exception>
         <exception cref="T:System.Threading.Tasks.TaskCanceledException">The task was canceled.</exception>
         <exception cref="T:System.Exception">The task completed in a <see cref="F:System.Threading.Tasks.TaskStatus.Faulted" /> state.</exception>

xml/System.Runtime.CompilerServices/TaskAwaiter`1.xml

@@ -65,15 +65,7 @@
   <Docs>
     <typeparam name="TResult">The result for the task.</typeparam>
     <summary>Represents an object that waits for the completion of an asynchronous task and provides a parameter for the result.</summary>
-    <remarks>
-      <format type="text/markdown"><![CDATA[
-
-## Remarks
-
-This type is intended for compiler use only.
-
-      ]]></format>
-    </remarks>
+    <remarks>To be added.</remarks>
   </Docs>
   <Members>
     <Member MemberName="GetResult">
@@ -121,7 +113,7 @@ This type is intended for compiler use only.
       <Docs>
         <summary>Ends the wait for the completion of the asynchronous task.</summary>
         <returns>The result of the completed task.</returns>
-        <remarks />
+        <remarks>To be added.</remarks>
         <exception cref="T:System.NullReferenceException">The <see cref="T:System.Runtime.CompilerServices.TaskAwaiter`1" /> object was not properly initialized.</exception>
         <exception cref="T:System.Threading.Tasks.TaskCanceledException">The task was canceled.</exception>
         <exception cref="T:System.Exception">The task completed in a <see cref="F:System.Threading.Tasks.TaskStatus.Faulted" /> state.</exception>

xml/System.Threading.Tasks/Task.xml

@@ -3114,15 +3114,7 @@ Starting in .NET 6, for some `T` types and some result values, this method may r
       <Docs>
         <summary>Gets an awaiter used to await this <see cref="T:System.Threading.Tasks.Task" />.</summary>
         <returns>An awaiter instance.</returns>
-        <remarks>
-          <format type="text/markdown"><![CDATA[
-
-## Remarks
-
-This method is intended for compiler use rather than use directly in code.
-
-          ]]></format>
-        </remarks>
+        <remarks>To be added.</remarks>
       </Docs>
     </Member>
     <Member MemberName="Id">

xml/System.Threading.Tasks/Task`1.xml

@@ -2071,15 +2071,7 @@ For operations that do not return a value, you use the <xref:System.Threading.Ta
       <Docs>
         <summary>Gets an awaiter used to await this <see cref="T:System.Threading.Tasks.Task`1" />.</summary>
         <returns>An awaiter instance.</returns>
-        <remarks>
-          <format type="text/markdown"><![CDATA[
-
-## Remarks
-
-This method is intended for compiler use rather than use directly in code.
-
-          ]]></format>
-        </remarks>
+        <remarks>To be added.</remarks>
       </Docs>
     </Member>
     <Member MemberName="Result">