RFR: 8312194: test/hotspot/jtreg/applications/ctw/modules/jdk_crypto_ec.java cannot handle empty modules

[Leonid Mesnik]

Removed empty module so CTW doesn't fail.

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Commit messages:
 - removed empty module

Changes: https://git.openjdk.org/jdk/pull/15201/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15201&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8312194
  Stats: 39 lines in 2 files changed: 0 ins; 39 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/15201.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15201/head:pull/15201

PR: https://git.openjdk.org/jdk/pull/15201