RFR: 8131: Fix UTFStringParser compile error

[Patrick Reinhart]

Removes no longer needed try catch block.

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Commit messages:
 - 8131: Fix UTFStringParser compile error

Changes: https://git.openjdk.org/jmc/pull/526/files
 Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=526&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8131
  Stats: 6 lines in 1 file changed: 0 ins; 5 del; 1 mod
  Patch: https://git.openjdk.org/jmc/pull/526.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/526/head:pull/526

PR: https://git.openjdk.org/jmc/pull/526