remove process module (#300)

Author: M-Lampert

src/pathpyG/__init__.py

@@ -14,6 +14,5 @@
 from pathpyG import io
 from pathpyG import nn
 from pathpyG import algorithms
-from pathpyG import processes
 from pathpyG import statistics
 from pathpyG.visualisations import plot, layout