fix(travis): unset _JAVA_OPTIONS for compile_frontend.py #3354
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fixes #3338
Unfortunately ChromeDevTools/devtools-frontend@5e7e9ca wasn't successful. Something else in
compile_frontend.py
is dependent on the exact output of the compiler and is breaking the build.In the Travis bug for this, unsetting the variable is mentioned as working, and though there is a concern that the new default JVM will run out of memory, it appears to work for us so let's go with it for now unless it ends up flaky.
travis-ci/travis-cookbooks#895 suggests Travis may move to using
JAVA_TOOL_OPTIONS
which won't get printed to stdout, so we may be able to remove this line again in the future.