treewide: drop pylint disable=no-self-use comments

pylint's 'no-self-use' check was moved to an optional extension, see [1].

[1] https://pylint.readthedocs.io/en/latest/whatsnew/2/2.14/summary.html#removed-checkers.

Signed-off-by: Bastian Krause <bst@pengutronix.de>

labgrid/remote/exporter.py

@@ -92,10 +92,10 @@ def broken(self, reason):
         self.data["acquired"] = "<broken>"
         self.logger.error("marked as broken: %s", reason)
 
-    def _get_start_params(self):  # pylint: disable=no-self-use
+    def _get_start_params(self):
         return {}
 
-    def _get_params(self):  # pylint: disable=no-self-use
+    def _get_params(self):
         return {}
 
     def _start(self, start_params):

labgrid/resource/udev.py

@@ -60,7 +60,7 @@ def __attrs_post_init__(self):
         self.match.setdefault('SUBSYSTEM', 'usb')
         super().__attrs_post_init__()
 
-    def filter_match(self, device):  # pylint: disable=unused-argument,no-self-use
+    def filter_match(self, device):  # pylint: disable=unused-argument
         return True
 
     def suggest_match(self, device):