Remove placeholder project name that is breaking tests

Author: ccarpentiere

notebooks/generative_ai/bq_dataframes_llm_output_schema.ipynb

@@ -169,7 +169,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "PROJECT = \"myproject\" # replace with your project\n",
+    "PROJECT = \"\" # replace with your project\n",
     "import bigframes\n",
     "bigframes.options.bigquery.project = PROJECT\n",
     "bigframes.options.display.progress_bar = None\n",