Remove pkg_resources

Author: Andrew Yang

diffpy/pdfmorph/version.py

@@ -18,9 +18,9 @@
 
 
 # obtain version information
-from pkg_resources import get_distribution
+from importlib.metadata import version
 
-__version__ = get_distribution('diffpy.pdfmorph').version
+__version__ = version('diffpy.pdfmorph')
 
 # we assume that tag_date was used and __version__ ends in YYYYMMDD
 __date__ = __version__[-8:-4] + '-' + __version__[-4:-2] + '-' + __version__[-2:]