G1: call CardTable::clear_MemRegion directly

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    • b13

      G1 manages covered heap-region itself, so the guard, `MemRegion mri = mr.intersection(_covered[i]);`, inside `CardTable::clear` is not needed.

      One can call `CardTable::clear_MemRegion` in G1 code.

            Assignee:
            Albert Yang
            Reporter:
            Albert Yang
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