Revert "bin/ci: Add GitLab basic token validation"

This validation code has 2 bugs, the main one being that it is wrong and
is refusing perfectly valid codes. Let's remove this until we come up
with a valid check.

This reverts commit cd8b546205.

Fixes: cd8b546205 ("bin/ci: Add GitLab basic token validation")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27312>

bin/ci/gitlab_common.py

@@ -8,29 +8,13 @@
 # SPDX-License-Identifier: MIT
 '''Shared functions between the scripts.'''
 
-import logging
 import os
-import re
 import time
 from pathlib import Path
 
 GITLAB_URL = "https://gitlab.freedesktop.org"
 TOKEN_DIR = Path(os.getenv("XDG_CONFIG_HOME") or Path.home() / ".config")
 
-# Known GitLab token prefixes: https://docs.gitlab.com/ee/security/token_overview.html#token-prefixes
-TOKEN_PREFIXES: dict[str, str] = {
-    "Personal access token": "glpat-",
-    "OAuth Application Secret": "gloas-",
-    "Deploy token": "gldt-",
-    "Runner authentication token": "glrt-",
-    "CI/CD Job token": "glcbt-",
-    "Trigger token": "glptt-",
-    "Feed token": "glft-",
-    "Incoming mail token": "glimt-",
-    "GitLab Agent for Kubernetes token": "glagent-",
-    "SCIM Tokens": "glsoat-"
-}
-
 
 def pretty_duration(seconds):
     """Pretty print duration"""
@@ -87,61 +71,25 @@ def get_token_from_default_dir() -> str:
         raise ex
 
 
-def validate_gitlab_token(token: str) -> bool:
-    token_suffix = token.split("-")[-1]
-    # Basic validation of the token suffix based on:
-    # https://gitlab.com/gitlab-org/gitlab/-/blob/master/gems/gitlab-secret_detection/lib/gitleaks.toml
-    if not re.match(r"(\w+-)?[0-9a-zA-Z_\-]{20,64}", token_suffix):
-        raise ValueError("The provided token does not match valid GitLab token format.")
-
-    for token_type, token_prefix in TOKEN_PREFIXES.items():
-        if token.startswith(token_prefix):
-            logging.info(f"Found probable token type: {token_type}")
-            return True
-
-    # If the token type is not recognized, return False
-    return False
-
-
-def get_token_from_arg(token_arg: str | Path | None) -> str | None:
-    if not token_arg:
-        logging.info("No token provided.")
-        return None
-
-    token_path = Path(token_arg)
-    if token_path.is_file():
-        return read_token_from_file(token_path)
-
-    return handle_direct_token(token_path, token_arg)
-
-
-def read_token_from_file(token_path: Path) -> str:
-    token = token_path.read_text().strip()
-    logging.info(f"Token read from file: {token_path}")
-    return token
-
-
-def handle_direct_token(token_path: Path, token_arg: str | Path) -> str | None:
-    if token_path == Path(get_token_from_default_dir()):
-        logging.warning(
-            f"The default token file {token_path} was not found. "
-            "Please provide a token file or a token directly via --token arg."
-        )
-        return None
-    logging.info("Token provided directly as an argument.")
-    return str(token_arg)
-
-
 def read_token(token_arg: str | Path | None) -> str | None:
-    token = get_token_from_arg(token_arg)
-    if token and not validate_gitlab_token(token):
-        logging.warning("The provided token is either an old token or does not seem to "
-                        "be a valid token.")
-        logging.warning("Newer tokens are the ones created from a Gitlab 14.5+ instance.")
-        logging.warning("See https://about.gitlab.com/releases/2021/11/22/"
-                        "gitlab-14-5-released/"
-                        "#new-gitlab-access-token-prefix-and-detection")
-    return token
+    """
+    Reads the token from the given file path or returns the token argument if it is not a file.
+
+    Args:
+        token_arg (str | Path | None): The file path or the token itself.
+
+    Returns:
+        str | None: The token string or None if the token is not provided.
+    """
+    if token_arg:
+        token_path = Path(token_arg)
+        if token_path.is_file():
+            # if is a file, read it
+            return token_path.read_text().strip()
+        return str(token_arg)
+
+    # if the token is not provided neither its file, return None
+    return None
 
 
 def wait_for_pipeline(projects, sha: str, timeout=None):