[analysis_server] remove two lint ignores for generated LSP spec files
Fixes #49059 `prefer_is_not_operator` `unnecessary_parenthesis` Change-Id: I79d3e1b6ed89d138a2bb6eab79fa8dcdc9a23080 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/245541 Reviewed-by: Danny Tuppeny <danny@tuppeny.com> Commit-Queue: Brian Wilkerson <brianwilkerson@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
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