Refactor: unified two-center integration interface #4441
Merged
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Reminder
Linked Issue
This PR is directly related to #4079 and also indirectly related to #4212 (removal of ORB_control)
What's changed?
The old and new two-center integration interface is unified such that the macro "USE_NEW_TWO_CENTER" is no longer needed in the place of calling the computation subroutine; ESolver_KS_LCAO<TK, TR>::init_basis_lcao is the only place where this macro is used.
Any changes of core modules? (ignore if not applicable)
No.