Remove matplotlib references

[montezdesousa]

Description

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[tehcoderer]

Here from

from openbb_terminal import OpenBBFigure
from openbb_terminal.core.plots.plotly_helper import theme

You can do this

from openbb_terminal import OpenBBFigure, theme

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (develop@8bd7606). Click here to learn what that means.
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #4479   +/-   ##
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  Coverage           ?   54.53%           
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  Files              ?      596           
  Lines              ?    53482           
  Branches           ?        0           
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  Hits               ?    29165           
  Misses             ?    24317           
  Partials           ?        0           

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[tehcoderer]

Looks good!!! Lets gooooo 🚀🚀🚀