ENH: do not fail with 3d nodes - preprocess.remove_false_nodes()

[jGaboardi]

• This PR resolves remove_false_nodes throws an unexpected error #657
• Open to suggests for a better error message.
• CI failure unrelated to this PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.1%. Comparing base (4037c70) to head (f6b4be5).
Report is 102 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #661     +/-   ##
=======================================
+ Coverage   97.4%   98.1%   +0.8%     
=======================================
  Files         26      40     +14     
  Lines       4328    7165   +2837     
=======================================
+ Hits        4214    7031   +2817     
- Misses       114     134     +20     

Files with missing lines	Coverage Δ
momepy/preprocessing.py	93.8% <100.0%> (+0.5%)	⬆️
momepy/tests/test_preprocess.py	100.0% <100.0%> (ø)

[martinfleis]

pre-commit.ci autofix