Revert "ensure latex is installed for rendering of plot (collab)"

This reverts commit b62d770.

Author: mmcky

lectures/kalman_2.md

@@ -50,12 +50,6 @@ In addition to what's in Anaconda, this lecture will need the following librarie
 
 To conduct simulations, we bring in these imports, as in {doc}`A First Look at the Kalman filter <kalman>`.
 
-```{code-cell} ipython3
-:tags: [hide-cell]
-
-!apt-get install dvipng texlive-latex-extra texlive-fonts-recommended cm-super
-```
-
 ```{code-cell} ipython3
 import matplotlib.pyplot as plt
 import numpy as np