Remove dead code from ProjectsHelper
What does this MR do and why?
Contributes to #420057
Unused methods were taken from the list: #420057 (comment 1567069598).
Problem
We have methods in ProjectsHelper that don't used anywhere.
Solution
Remove unused code.
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Edited by Vasilii Iakliushin