RFR: 8263445: Duplicate key compiler.err.expected.module in compiler.properties

[Adam Sotona]

src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties  contains duplicate key:
compiler.err.expected.module

This fix removes the first occurrence of the key to remove the duplicity and keep the actual content of the property.

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Commit messages:
 - 8263445: Duplicate key compiler.err.expected.module in compiler.properties

Changes: https://git.openjdk.java.net/jdk/pull/4186/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4186&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263445
  Stats: 3 lines in 1 file changed: 0 ins; 3 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4186.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4186/head:pull/4186

PR: https://git.openjdk.java.net/jdk/pull/4186