Removed comment about Java

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets | none

A very small adjustment, but:

1. I think we shouldn't speak badly about another programming language, especially since Symfony in my eyes has such a friendly attitude towards other languages and frameworks. We should keep it that way.
2. There is nothing inherently "bad" about a Java specification or anything Java-related. If it is, it should be explained (not here, but somewhere else).