Remvoe outdated assert

Author: MihaZupan

src/libraries/System.Private.CoreLib/src/System/SearchValues/Strings/Helpers/StringSearchValuesHelper.cs

@@ -429,7 +429,6 @@ public static bool Equals<TValueLength>(ref char matchStart, ref readonly Single
                 else
                 {
                     Debug.Assert(state.Value.Length is 2 or 3);
-                    Debug.Assert((matchStart & ~0x20) == (state.Value[0] & ~0x20));
 
                     ref byte matchByteStart = ref Unsafe.As<char, byte>(ref matchStart);
                     uint differentBits = (Unsafe.ReadUnaligned<uint>(ref matchByteStart) & state.ToUpperMask32_0) - state.Value32_0;