Use remarks section only

Author: antonfirsov

xml/System.Net/CookieContainer.xml

@@ -77,11 +77,6 @@
 
  The <xref:System.Net.CookieContainer> has three properties that govern the volume of the content of the container: <xref:System.Net.CookieContainer.Capacity%2A>, <xref:System.Net.CookieContainer.MaxCookieSize%2A>, and <xref:System.Net.CookieContainer.PerDomainCapacity%2A>. These values have the default settings of 300, 4096, and 20 respectively. When a <xref:System.Net.Cookie> is added to the container, these properties are used to determine whether a <xref:System.Net.Cookie> already contained in the <xref:System.Net.CookieContainer> should be discarded to make room for the new one. The <xref:System.Net.CookieContainer> keeps track of each addition to ensure that neither the <xref:System.Net.CookieContainer.Capacity%2A> nor the <xref:System.Net.CookieContainer.PerDomainCapacity%2A> limits are exceeded. If one or both are exceeded, then <xref:System.Net.Cookie> instances held by the <xref:System.Net.CookieContainer> are removed. First, any expired <xref:System.Net.Cookie> is removed. If further capacity must be recaptured, then the least-recently used <xref:System.Net.CookieCollection> is purged.
 
- ]]></format>
-    </remarks>
-    <threadsafe>
-      <format type="text/markdown"><![CDATA[
-
 ## Thread Safety
  
   The methods for adding and retrieving <xref:System.Net.Cookie> instances to and from a <xref:System.Net.CookieContainer> are thread-safe and can be used concurrently from multiple threads.
@@ -91,7 +86,7 @@
   > It is not recommended to use cookies together with <xref:System.Net.Http.IHttpClientFactory>.
 
  ]]></format>
-    </threadsafe>
+    </remarks>
     <altmember cref="T:System.Net.Cookie" />
     <altmember cref="T:System.Net.CookieCollection" />
     <altmember cref="T:System.Net.CookieContainer" />