remove unused code

[alex-dukhno]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 823023360

• 6 of 28 (21.43%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+2.3%) to 68.319%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
node_engine/src/worker.rs	6	28	21.43%

Files with Coverage Reduction	New Missed Lines	%
node_engine/src/worker.rs	1	56.36%
sql_engine/query_analyzer/src/lib.rs	1	90.97%

Totals
Change from base Build 822800464:	2.3%
Covered Lines:	2564
Relevant Lines:	3753

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💛 - Coveralls