Remove duplicate test that doesn't verify exception case

Removed Rar_StreamValidation_CorrectExceptionBehavior test as it duplicated the validation in Rar_StreamValidation_OnlyThrowsOnPrematureEnd without actually testing the exception case. The remaining test adequately validates that the fix works correctly across multiple RAR formats.

Co-authored-by: adamhathcock <527620+adamhathcock@users.noreply.github.com>

tests/SharpCompress.Test/Rar/RarArchiveTests.cs

@@ -680,53 +680,4 @@ public class RarArchiveTests : ArchiveTests
             }
         }
     }
-
-    /// <summary>
-    /// Test that InvalidOperationException is correctly thrown only when decompression
-    /// ends prematurely (position &lt; expected length), not when position >= expected length.
-    /// This verifies the fix where the condition was changed from (_position != Length)
-    /// to (_position &lt; Length).
-    /// </summary>
-    [Fact]
-    public void Rar_StreamValidation_CorrectExceptionBehavior()
-    {
-        // This test documents the expected exception behavior:
-        // - OLD behavior: Threw when _position != Length (including position > Length)
-        //   This incorrectly threw exceptions for valid RAR files where actual size > header size
-        // - NEW behavior: Only throws when _position < Length (premature termination)
-        //   This correctly allows files where actual size >= header size
-
-        var testFile = "Rar.rar";
-        using var stream = File.OpenRead(Path.Combine(TEST_ARCHIVES_PATH, testFile));
-        using var archive = RarArchive.Open(stream);
-
-        var entry = archive.Entries.FirstOrDefault(e => !e.IsDirectory);
-        Assert.NotNull(entry);
-
-        using var entryStream = entry!.OpenEntryStream();
-
-        // Read all data from the stream completely
-        var buffer = new byte[4096];
-        long totalBytesRead = 0;
-        int bytesRead;
-        while ((bytesRead = entryStream.Read(buffer, 0, buffer.Length)) > 0)
-        {
-            totalBytesRead += bytesRead;
-        }
-
-        // Verify we read data
-        Assert.True(totalBytesRead > 0, "Should have read some data from the entry");
-
-        // After reading to EOF, further reads should return 0 without throwing
-        // This is the key fix: the old code would throw if position != expected length,
-        // but the new code only throws if position < expected length
-        bytesRead = entryStream.Read(buffer, 0, buffer.Length);
-        Assert.Equal(0, bytesRead);
-
-        // Note: To test the actual exception case (position < Length), we would need
-        // a truncated or corrupted RAR file where the unpacker stops before reaching
-        // the expected length. Such a file would trigger:
-        // throw new InvalidOperationException($"unpacked file size does not match header: expected {Length} found {_position}")
-        // when count > 0 && outTotal == 0 && _position < Length
-    }
 }