revert: don't filter out null in simpsons dataset

Author: juba

tests/ui/tests/notebooks/complex_plots.ipynb

@@ -12,7 +12,7 @@
     "\n",
     "import polars as pl\n",
     "\n",
-    "simpsons = pl.read_csv(\"data/simpsons.csv\").filter(pl.col(\"imdb_rating\").is_not_null())\n",
+    "simpsons = pl.read_csv(\"data/simpsons.csv\")\n",
     "penguins = pl.read_csv(\"data/penguins.csv\")\n",
     "metros = pl.read_csv(\"data/metros.csv\")\n",
     "\n",
@@ -253,7 +253,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.10"
+   "version": "3.11.9"
   },
   "orig_nbformat": 4
  },