RFR: 8367101: Remove unused includes in cardTable.cpp

[Albert Mingkun Yang]

Trivial removing unused includes.

Test: tier1

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Commit messages:
 - card-table-trivial

Changes: https://git.openjdk.org/jdk/pull/27144/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27144&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8367101
  Stats: 3 lines in 1 file changed: 0 ins; 3 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/27144.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27144/head:pull/27144

PR: https://git.openjdk.org/jdk/pull/27144