Unskip taxi notebook from CI (#1422)

#1407 skipped the taxi dropoffs notebook due to performance regression fixed in #1418, so this PR re-enables the notebook in CI by removing it from SKIPNBS in ci/test_noteboks.sh.

Authors:
  - Mark Harris (https://github.com/harrism)

Approvers:
  - https://github.com/jakirkham
  - Michael Wang (https://github.com/isVoid)
  - James Lamb (https://github.com/jameslamb)

URL: #1422

ci/test_notebooks.sh

@@ -29,7 +29,7 @@ NBTEST="$(realpath "$(dirname "$0")/utils/nbtest.sh")"
 
 # Add notebooks that should be skipped here
 # (space-separated list of filenames without paths)
-SKIPNBS="binary_predicates.ipynb cuproj_benchmark.ipynb nyc_taxi_years_correlation.ipynb"
+SKIPNBS="binary_predicates.ipynb cuproj_benchmark.ipynb"
 
 EXITCODE=0
 trap "EXITCODE=1" ERR