Delete stale ActiveIssue from HttpHeadersTest (#55027)

This is reported to have been fixed by https://github.com/dotnet/runtime/pull/54932.

diff --git a/src/libraries/System.Net.Http/tests/UnitTests/Headers/HttpHeadersTest.cs b/src/libraries/System.Net.Http/tests/UnitTests/Headers/HttpHeadersTest.cs
index 2486e8b..f2a4367 100644 (file)
--- a/src/libraries/System.Net.Http/tests/UnitTests/Headers/HttpHeadersTest.cs
+++ b/src/libraries/System.Net.Http/tests/UnitTests/Headers/HttpHeadersTest.cs
@@ -1538,7 +1538,6 @@ namespace System.Net.Http.Tests
             Assert.Equal(new HashSet<string> { "Location", "Date" }, nonValidated.Keys.ToHashSet());
         }
 
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/53647", TestPlatforms.Browser)]
         [Fact]
         public void NonValidated_ValidInvalidAndRaw_AllReturned()
         {