RFR: JDK-8297731: Remove redundant check in MutableBigInteger.divide

[Joe Darcy]

Remove redundant code reported in

https://mail.openjdk.org/pipermail/core-libs-dev/2022-November/097163.html

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Commit messages:
 - JDK-8297731: Remove redundant check in MutableBigInteger.divide

Changes: https://git.openjdk.org/jdk/pull/11395/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11395&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297731
  Stats: 7 lines in 1 file changed: 0 ins; 2 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/11395.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11395/head:pull/11395

PR: https://git.openjdk.org/jdk/pull/11395