Remove unused commented import in lib.rs

[viktorking7]

Summary

Remove unused commented import // use gates::flex_gate::MAX_PHASE; from halo2-base/src/lib.rs.

Changes

• Deleted line 35: // use gates::flex_gate::MAX_PHASE;

Rationale

• The constant MAX_PHASE is actively used throughout the codebase (35 occurrences found)
• It's imported directly in modules where needed, not through the main library file