Analytics deps optimisation (#569)

* optimize analytic deps in requrements.txt
* rm hooks/hook-sklearn.py

analytics/pyinstaller_hooks/hook-sklearn.py

@@ -1,3 +0,0 @@
-from PyInstaller.utils.hooks import collect_submodules
-
-hiddenimports = collect_submodules('sklearn')

analytics/requirements.txt

@@ -1,18 +1,6 @@
-altgraph==0.15
 attrdict==2.0.0
 aiounittest==1.1.0
-future==0.16.0
-macholib==1.9
 numpy==1.14.5
 pandas==0.20.3
-pandas-datareader==0.6.0
-patsy==0.5.0
-pefile==2017.11.5
-python-dateutil==2.7.3
-pytz==2018.4
 pyzmq==18.0.1
-scikit-learn==0.19.1
 scipy==1.1.0
-seglearn==0.1.6
-six==1.11.0
-ptvsd==4.2.6