the `@abstract` attribute seems to be redundant

See #3529, release log:

• 4f291e6 by @yegor256: function name allow more
• b37632b by @yegor256: Merge pull request #3604 from ...
• 027c0fa by @maxonfjvipon: fix(#3602): removed dot from X...
• c80994b by @yegor256: fqn
• bd42077 by @yegor256: fqn
• a07ea98 by @yegor256: stronger fqn
• 4e1d993 by @yegor256: fqn
• c540189 by @yegor256: AMP remove
• 6ae7e3b by @yegor256: lint is back
• d72bd76 by @yegor256: get rid of &
• 812e210 by @yegor256: rename
• fe259cf by @yegor256: Merge pull request #3597 from ...
• 8d77ab6 by @yegor256: Merge pull request #3598 from ...
• f293ae0 by @yegor256: Merge pull request #3599 from ...
• 022bfb4 by @maxonfjvipon: fix(#3529): io
• 0d683bf by @maxonfjvipon: fix(#3529): groovy
• 854195d by @maxonfjvipon: fix(#3529): finally
• ef84d92 by @maxonfjvipon: fix(#3529): transpile
• 998f25e by @renovate[bot]: chore(deps): update jamesives/...
• 8dbd775 by @renovate[bot]: fix(deps): update dependency o...
• and 8 more...

Released by Rultor 2.0-SNAPSHOT, see build log