Sync shared code from runtime (#57440)

Co-authored-by: Tratcher <Tratcher@users.noreply.github.com>

Author: github-actions[bot]

src/Shared/test/Shared.Tests/runtime/Http2/HPackDecoderTest.cs

@@ -151,25 +151,6 @@ public void DecodesIndexedHeaderField_DynamicTable()
             Assert.Equal(_headerValueString, _handler.DecodedHeaders[_headerNameString]);
         }
 
-        [Fact]
-        public void DecodesIndexedHeaderField_DynamicTable_ReferencedEntryRemovedOnInsertion()
-        {
-            // Pre-populate the dynamic table so we'll have something to reference.
-            // This entry will have index 62 (0x3E).
-            _dynamicTable.Insert(_headerNameBytes, _headerValueBytes);
-            Assert.Equal(1, _dynamicTable.Count);
-
-            Assert.InRange(_dynamicTable.MaxSize, 1, _literalHeaderNameBytes.Length); // Assert that our string will be too big
-
-            byte[] encoded = (new byte[] { 0x40 | 0x3E }) // Indexing enabled (0x40) | dynamic table (62 = 0x3E) as a 6-integer, 
-                .Concat(_literalHeaderName) // A header value that's too large to fit in the dynamic table
-                .ToArray();
-
-            _decoder.Decode(encoded, endHeaders: true, handler: _handler);
-            Assert.Equal(0, _dynamicTable.Count); // The large entry caused the table to be wiped
-            Assert.Equal(_literalHeaderNameString, _handler.DecodedHeaders[_headerNameString]); // but we got the header anyway
-        }
-
         [Fact]
         public void DecodesIndexedHeaderField_OutOfRange_Error()
         {