RFR: 8328997: Remove unnecessary template parameter lists in GrowableArray

[Kim Barrett]

Please review this change to the GrowableArray code to remove unnecessary
template parameter lists.  They aren't needed, and some may become
syntactically invalid in the future.

Testing: mach5 tier1.

-------------

Commit messages:
 - remove unneeded specializations

Changes: https://git.openjdk.org/jdk/pull/18480/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18480&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328997
  Stats: 16 lines in 1 file changed: 0 ins; 0 del; 16 mod
  Patch: https://git.openjdk.org/jdk/pull/18480.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18480/head:pull/18480

PR: https://git.openjdk.org/jdk/pull/18480