Remove is_fork

scripts/nb-tester/qiskit_docs_notebook_tester/config.py

@@ -164,22 +164,6 @@ def notebooks_to_execute(self) -> Iterator[Path]:
                 )
                 continue
 
-            if self.args.is_fork:
-                print(
-                    "⛔️ We can't run notebook tests on pull requests from forks "
-                    "because of how GitHub Secrets work."
-                    "\n\n"
-                    "If you have write access to Qiskit/documentation, push to a new "
-                    "branch there and make your pull request from that branch instead."
-                    "\n\n"
-                    "If you don't have write access, you should locally test out the notebooks you're modifying "
-                    "by using the instructions in "
-                    "https://github.com/Qiskit/documentation#execute-notebooks. "
-                    "When this PR is approved, a maintainer will merge it to a new "
-                    "branch in Qiskit/documentation, then make a PR from that branch "
-                    "into main so it can pass CI.\n",
-                )
-                sys.exit(1)
             yield path
 
     def should_patch(self, path: Path) -> bool:
@@ -242,14 +226,6 @@ def get_args() -> argparse.Namespace:
         "--config-path",
         help="Path to a TOML file containing the globs for detecting and sorting notebooks",
     )
-    parser.add_argument(
-        "--is-fork",
-        action="store_true",
-        help=(
-            "Set to true when running on forks in CI, since authentication cannot work there. "
-            "The program will fail with a helpful message if any of the notebooks cannot be executed."
-        ),
-    )
     parser.add_argument(
         "--provider",
         action="store",