FYI: 8243159: Disable unused glyph cache code in LCD rendering

[Jayathirth D V]

Present code doesnt use LCD glyph cache but it initializes and adds glyphs to it which will consume compute cycles.

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Commit messages:
 - 8243159: Disable unused glyph cache code in LCD rendering

Changes: https://git.openjdk.java.net/lanai/pull/29/files
 Webrev: https://webrevs.openjdk.java.net/lanai/29/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8243159
  Stats: 13 lines in 1 file changed: 1 ins; 2 del; 10 mod
  Patch: https://git.openjdk.java.net/lanai/pull/29.diff
  Fetch: git fetch https://git.openjdk.java.net/lanai pull/29/head:pull/29

PR: https://git.openjdk.java.net/lanai/pull/29