RFR: 8302858: Polish FlightRecorderMXBeanImpl

[Erik Gahlin]

On Mon, 20 Feb 2023 10:51:29 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR proposes some polishing of the `FlightRecorderMXBeanImpl` class.

src/jdk.management.jfr/share/classes/jdk/management/jfr/FlightRecorderMXBeanImpl.java line 286:

> 284:             Object value = entry.getValue();
> 285:             if (!(key instanceof String)) {
> 286:                 throw new IllegalArgumentException("Option key must not be null, or other type than " + String.class);

Why is the type check removed?

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PR: https://git.openjdk.org/jdk/pull/12656