CachingUtilities.py: Removes Unnecessary imports
CachingUtilities.py: Removes Unnecessary imports

Removes unnecessary imports on CachingUtilities.pickle_load docstring.

Closes https://github.com/coala/coala/issues/5441

SanketDG/coala,jayvdb/coala,coala/coala,jayvdb/coala,coala-analyzer/coala,coala/coala,SanketDG/coala,coala-analyzer/coala,SanketDG/coala,coala-analyzer/coala,jayvdb/coala,coala/coala