refactor: remove the implicit convert for obsolete IPNetwork

Author: WeihanLi

src/Middleware/HttpOverrides/src/IPNetwork.cs

@@ -52,16 +52,11 @@ public static bool TryParse(ReadOnlySpan<char> networkSpan, [NotNullWhen(true)]
     {
         if (System.Net.IPNetwork.TryParse(networkSpan, out var ipNetwork))
         {
-            network = ipNetwork;
+            network = new(ipNetwork);
             return true;
         }
 
         network = null;
         return false;
     }
-
-    /// <summary>
-    /// Convert <see cref="System.Net.IPNetwork" /> to <see cref="Microsoft.AspNetCore.HttpOverrides.IPNetwork" /> implicitly
-    /// </summary>
-    public static implicit operator IPNetwork(System.Net.IPNetwork ipNetwork) => new IPNetwork(ipNetwork);
 }

src/Middleware/HttpOverrides/src/PublicAPI.Unshipped.txt

@@ -1,4 +1,3 @@
 #nullable enable
 *REMOVED*Microsoft.AspNetCore.Builder.ForwardedHeadersOptions.KnownNetworks.get -> System.Collections.Generic.IList<Microsoft.AspNetCore.HttpOverrides.IPNetwork!>!
 Microsoft.AspNetCore.Builder.ForwardedHeadersOptions.KnownNetworks.get -> System.Collections.Generic.IList<System.Net.IPNetwork>!
-static Microsoft.AspNetCore.HttpOverrides.IPNetwork.implicit operator Microsoft.AspNetCore.HttpOverrides.IPNetwork!(System.Net.IPNetwork ipNetwork) -> Microsoft.AspNetCore.HttpOverrides.IPNetwork!