RFR: 8336495: Remove unnecessary casts in output.cpp

[Sonia Zaldana Calles]

Hi all, 

This PR addresses [8336495](https://bugs.openjdk.org/browse/JDK-8336495) removing unnecessary casts in output.cpp. 

Thanks, 
Sonia

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Commit messages:
 - 8336495: Remove unnecessary casts in output.cpp

Changes: https://git.openjdk.org/jdk/pull/20335/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20335&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8336495
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/20335.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20335/head:pull/20335

PR: https://git.openjdk.org/jdk/pull/20335