remove not used parameters

Author: sooahleex

mmseg/core/lr/base_lr_hook.py

@@ -131,10 +131,6 @@ def before_run(self, runner):
             self.base_lr = [
                 group['initial_lr'] for group in runner.optimizer.param_groups
             ]
-        self.bad_count = 0
-        self.last_iter = 0
-        self.current_lr = None
-        self.best_score = self.init_value_map[self.rule]
 
     def _init_states(self, runner):
         if self.by_epoch: