fixup! Drop optional parameters in NetworkExtensions.cs

Author: nulltoken

LibGit2Sharp/NetworkExtensions.cs

@@ -41,7 +41,6 @@ public static void Push(
         /// </summary>
         /// <param name="network">The <see cref="Network"/> being worked with.</param>
         /// <param name="branches">The branches to push.</param>
-        /// <param name="pushOptions"><see cref="PushOptions"/> controlling push behavior</param>
         /// <exception cref="LibGit2SharpException">Throws if either the Remote or the UpstreamBranchCanonicalName is not set.</exception>
         public static void Push(
             this Network network,