RFR: 8332120: Potential compilation failure in istream.cpp:205 - loss of data on conversion

[Coleen Phillimore]

This field _line_ending isn't used, and I'm not sure how this even works.  So I deleted it.
Tested with tier1 on many Oracle supported platforms.

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Commit messages:
 - 8332120: Potential compilation failure in istream.cpp:205 - loss of data on conversion

Changes: https://git.openjdk.org/jdk/pull/20427/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20427&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8332120
  Stats: 9 lines in 2 files changed: 0 ins; 8 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20427.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20427/head:pull/20427

PR: https://git.openjdk.org/jdk/pull/20427