equalize_sidebearings.py: Remove unused import
equalize_sidebearings.py: Remove unused import

This import is obsolete since 2180b298ff7fbee1df2d69c4552266c13d40c57c.

teddywing/RoboFont-Equalize-Sidebearings-Key,teddywing/RoboFont-Equalize-Sidebearings-Key