delete duplicate </exception> tags

Author: antonfirsov

xml/System.Net.Http/HttpClient.xml

@@ -2358,7 +2358,6 @@ The <paramref name="requestUri" /> is not an absolute URI.
 -or-
 
 The size specified is greater than the maximum allowed buffer size.</exception>
-        </exception>
         <exception cref="T:System.InvalidOperationException">An operation has already been started on the current instance.</exception>
         <exception cref="T:System.ObjectDisposedException">The current instance has been disposed.</exception>
       </Docs>
@@ -3734,7 +3733,6 @@ httpClient.Timeout = TimeSpan.FromMinutes(10);
 -or-
 
 The timeout specified is greater than <see cref="F:System.Int32.MaxValue" /> milliseconds.</exception>
-        .</exception>
         <exception cref="T:System.InvalidOperationException">An operation has already been started on the current instance.</exception>
         <exception cref="T:System.ObjectDisposedException">The current instance has been disposed.</exception>
       </Docs>

xml/System.Net.Http/SocketsHttpHandler.xml

@@ -520,7 +520,6 @@ The default proxy is used only when <xref:System.Net.Http.SocketsHttpHandler.Use
 -or-
 
 The timeout specified is greater than <see cref="F:System.Int32.MaxValue" /> milliseconds.</exception>
-        .</exception>
         <exception cref="T:System.InvalidOperationException">An operation has already been started on the current instance.</exception>
         <exception cref="T:System.ObjectDisposedException">The current instance has been disposed.</exception>
       </Docs>
@@ -634,7 +633,6 @@ Delay value must be greater than or equal to 1 second. Set to <xref:System.Threa
 -or-
 
 The provided value is greater than <see cref="F:System.Int32.MaxValue" /> milliseconds.</exception>
-        .</exception>
         <exception cref="T:System.InvalidOperationException">An operation has already been started on the current instance.</exception>
         <exception cref="T:System.ObjectDisposedException">The current instance has been disposed.</exception>
       </Docs>
@@ -712,7 +710,6 @@ Timeout must be greater than or equal to 1 second. Set to <xref:System.Threading
 -or-
 
 The provided value is greater than <see cref="F:System.Int32.MaxValue" /> milliseconds.</exception>
-        .</exception>
         <exception cref="T:System.InvalidOperationException">An operation has already been started on the current instance.</exception>
         <exception cref="T:System.ObjectDisposedException">The current instance has been disposed.</exception>
       </Docs>