RFR: 8372292: Remove redundant "throws ConfigException"

[Alexey Semenyuk]

- Remove redundant "throws ConfigException"
 - Remove redundant `toSupplier(...)`, `toConsumer(...)`, etc calls.

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Commit messages:
 - Remove redundant "throws ConfigException"

Changes: https://git.openjdk.org/jdk/pull/28440/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28440&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372292
  Stats: 173 lines in 23 files changed: 11 ins; 87 del; 75 mod
  Patch: https://git.openjdk.org/jdk/pull/28440.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28440/head:pull/28440

PR: https://git.openjdk.org/jdk/pull/28440