Redundant mutually left-recursive sets

```
[ERROR] error(119): JavaParser2.g4::: The following sets of rules are mutually left-recursive [primary, classInstanceCreationExpression, fieldAccess, methodInvocation, methodReference, primaryNoNewArray, arrayAccess] and [primaryNoNewArray, arrayAccess, fieldAccess, primary, classInstanceCreationExpression, methodInvocation, methodReference]
```

`[primary, classInstanceCreationExpression, fieldAccess, methodInvocation, methodReference, primaryNoNewArray, arrayAccess]`
and
`[primaryNoNewArray, arrayAccess, fieldAccess, primary, classInstanceCreationExpression, methodInvocation, methodReference]`

contain the exactly same elements and shouldn't be reported as two separate sets.

Start by locating the mutually left-recursive rule analysis that produces the diagnostic for JavaParser2.g4 and reproduce the report shown in the issue. Trace how recursive rule sets are collected and compared; done means identical sets are reported only once, with the existing diagnostic still correct.

Written by the indexing model from the issue text.