MAINT: remove installs of gpu related software

Author: mmcky

lectures/ar1_bayes.md

@@ -17,7 +17,7 @@ We'll begin with some Python imports.
 
 
 ```{code-cell} ipython3
-:tags: [hide-output]
+:tags: [hide-output, skip-execution]
 
 !pip install arviz pymc numpyro jax
 ```

lectures/back_prop.md

@@ -14,9 +14,14 @@ kernelspec:
 # Introduction to Artificial Neural Networks
 
 ```{code-cell} ipython3
-:tags: [hide-output]
+:tags: [skip-execution]
 
 !pip install --upgrade jax jaxlib kaleido
+```
+
+```{code-cell} ipython3
+:tags: [hide-output]
+
 !conda install -y -c plotly plotly plotly-orca retrying
 ```
 

lectures/bayes_nonconj.md

@@ -44,7 +44,7 @@ The two Python modules are
 As usual, we begin by importing some Python code.
 
 ```{code-cell} ipython3
-:tags: [hide-output]
+:tags: [hide-output, skip-execution]
 
 # install dependencies
 !pip install numpyro pyro-ppl torch jax

lectures/mix_model.md

@@ -15,9 +15,10 @@ kernelspec:
 # Incorrect Models
 
 In addition to what's in Anaconda, this lecture will need the following libraries:
+
 ```{code-cell} ipython
 ---
-tags: [hide-output]
+tags: [hide-output, skip-execution]
 ---
 !pip install numpyro jax
 ```