swanspawner: Remove gpu egroup requirement

It was decided to allow any SWAN user to use the GPU resources available
in the SWAN service, granted there are GPUs available to be used.

Therefore, the egroup restriction was removed.

SwanSpawner/swanspawner/swankubespawner.py

@@ -27,8 +27,6 @@ async def start(self):
         """
 
         if self._gpu_requested():
-            self._check_gpu_access()
-
             self.extra_resource_guarantees["nvidia.com/gpu"] = "1"
             self.extra_resource_limits["nvidia.com/gpu"] = "1"
         elif "nvidia.com/gpu" in self.extra_resource_guarantees:
@@ -116,12 +114,4 @@ def get_env(self):
 
     def _gpu_requested(self):
         """Returns true if the user requested a GPU"""
-        return "cu" in self.user_options[self.lcg_rel_field]
-
-    def _check_gpu_access(self):
-        """Checks if the user is allowed to start a session with a GPU"""
-        if "swan-gpu" not in self.user_roles:
-            raise ValueError(
-                """Access to GPUs is not granted;
-                please <a href="https://cern.service-now.com/service-portal?id=functional_element&name=swan" target="_blank">open a Support Ticket</a>"""
-                )
+        return "cu" in self.user_options[self.lcg_rel_field]