Cherrypick #1485 for v2.41.x branch (#1486)

Author: jtattermusch

test/Grpc.Net.Client.Tests/AsyncUnaryCallTests.cs

@@ -81,10 +81,8 @@ public async Task AsyncUnaryCall_Success_HttpRequestMessagePopulated()
             Assert.AreEqual("grpc-dotnet", grpcVersion.Product?.Name);
             Assert.IsTrue(!string.IsNullOrEmpty(grpcVersion.Product?.Version));
 
-            // Santity check that the user agent doesn't have the git hash in it and isn't too long.
-            // Sending a long user agent with each call has performance implications.
+            // Sanity check that the user agent doesn't have the git hash in it.
             Assert.IsFalse(grpcVersion.Product!.Version!.Contains('+'));
-            Assert.IsTrue(grpcVersion.Product!.Version!.Length <= 10);
         }
 
         [Test]