Remove Successive Duplicate From A Large List (200k by 4 matrix)

I am interested in removing successive duplicate rows from a very large list (~200k rows by 4 columns) using Mathematica.The built-in 'DeleteDuplicates' seems to remove all duplicates, I am interested in removing contiguous or successive duplicate. In other words, duplicate can still exist but not in a contiguous manner.

As an example: TCC12, TCC12, B96, TM12, TCC12, B96 should be TCC12, B96, TM12, TCC12, B96

Thanks

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