revert unnecessary change to setup.py

setup.py

@@ -34,6 +34,11 @@
     "google-api-core >= 2.10.2, <3.0.0dev",
     "google-auth >=2.13.0",
     "google-auth-oauthlib >=0.7.0",
+    # Require 1.27.* because it has a fix for out-of-bounds timestamps.  See:
+    # https://github.com/googleapis/python-bigquery/pull/209 and
+    # https://github.com/googleapis/python-bigquery-pandas/issues/365
+    # Exclude 2.4.* because it has a bug where waiting for the query can hang
+    # indefinitely. https://github.com/pydata/pandas-gbq/issues/343
     "google-cloud-bigquery >=3.3.5,<4.0.0dev,!=2.4.*",
     "google-cloud-bigquery-storage >=2.16.2,<3.0.0dev",
     "packaging >=20.0.0",