Matplotlib import under calculations.themis_observations -> slowing down imports again.

[alhom]

Possible regression case. Plotting functionality should in any case be under plot, to be split there.

Here:

analysator/analysator/calculations/themis_observation.py

Line 26 in 6a13831

import matplotlib.pyplot as plt

Gyrophaseangle as well has an unused import:

analysator/analysator/calculations/gyrophaseangle.py

Line 25 in 6a13831

import matplotlib.pyplot as plt

[lassejsc]

(Gyrophaseangle import is dealt in #427 )

[alhom]

Ha, I was thinking we had dealt with this already. Well, you had, but not me.

[lassejsc]

Note. PR for themis in #448