Remove the `ActiveRecord::QueryMethods#build_select` override

Why are we doing this work

The ActiveRecord::QueryMethods#build_select method is overridden by us here.

We should remove that to keep using the new Rails features like ignored_columns and enumerate_columns_in_select_statements.

Relevant links

Non-functional requirements

• Documentation:
• Feature flag:
• Performance:
• Testing:

Implementation plan