accounts/abi/bind: remove unused err set and check (ethereum#29269)

accounts/abi: remove unused err set and check

Author: kumakichi

accounts/abi/bind/base.go

@@ -461,7 +461,7 @@ func (c *BoundContract) FilterLogs(opts *FilterOpts, name string, query ...[]int
 	if err != nil {
 		return nil, nil, err
 	}
-	sub, err := event.NewSubscription(func(quit <-chan struct{}) error {
+	sub := event.NewSubscription(func(quit <-chan struct{}) error {
 		for _, log := range buff {
 			select {
 			case logs <- log:
@@ -470,11 +470,8 @@ func (c *BoundContract) FilterLogs(opts *FilterOpts, name string, query ...[]int
 			}
 		}
 		return nil
-	}), nil
+	})
 
-	if err != nil {
-		return nil, nil, err
-	}
 	return logs, sub, nil
 }