`ch6/bonus.related-terms-from-documents`, `ch6/synonym detection-v2.ipynb` & `ch6/RelatedKeywords-Samples` has missing code

[alexott]

Cell 4 uses a variable that isn't defined

aggr_signals = aggr_signals[aggr_signals["count"] > 1]
aggr_signals.shape[0]

gives

---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
Cell In[4], line 1
----> 1 aggr_signals = aggr_signals[aggr_signals["count"] > 1]
      2 aggr_signals.shape[0]

NameError: name 'aggr_signals' is not defined

[treygrainger]

ch6/synonym detection-v2.ipynb & ch6/RelatedKeywords-Samples were old notebooks. I've removed them. The bonus one I was planning to keep just as extra useful code, but will take a look at it to see if it's worth keeping, as it's not referenced in the manuscript and may not be worth the effort.

[alexott]

fixed