[lworld] RFR: 8374007: [lworld] Remove dead code in Symbol

[Stefan Karlsson]

There's dead code in Symbol that I propose that we remove.

FWIW, I stared at Symol::is_same_fundamental_type a bit and think that there's a bug in that function and that the second `ends_with` should have been `s->ends_with`.

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Commit messages:
 - 8374007: [lworld] Remove dead code in Symbol

Changes: https://git.openjdk.org/valhalla/pull/1829/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1829&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8374007
  Stats: 43 lines in 2 files changed: 0 ins; 43 del; 0 mod
  Patch: https://git.openjdk.org/valhalla/pull/1829.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1829/head:pull/1829

PR: https://git.openjdk.org/valhalla/pull/1829