The classify_page function was defined twice (at line 564 and line 744) in
crates/pdftract-core/src/classify.rs, causing compilation errors during test
builds. Removed the duplicate definition.
This fix enables the object parser test suite to compile and run successfully,
verifying all acceptance criteria for pdftract-4fa9:
- 10 fixture files with golden outputs
- 5 proptest properties passing
- circular_self test with 64KB stack passing
- proptest-regressions directories in place
Verification: notes/pdftract-4fa9.md
Closes pdftract-4fa9