ipfs: IPNS - leftover lint from API change

The IPFS subsystem used to be constructed from the core API if it was
not optionally overridden. This option and the default construction
logic were removed, and an `fs.FS` was added as a required parameter to
the IPNS constructor; but the default field filler was not cleaned up
after this change happened.

Author: djdv

internal/filesystem/ipfs/ipns.go

@@ -71,14 +71,14 @@ func NewIPNS(core coreiface.CoreAPI, ipfs fs.FS, options ...IPNSOption) (*IPNS,
 			return nil, err
 		}
 	}
-	if err := settings.fillInDefaults(core); err != nil {
+	if err := settings.fillInDefaults(); err != nil {
 		fsys.cancel()
 		return nil, err
 	}
 	return fsys, nil
 }
 
-func (settings *ipnsSettings) fillInDefaults(core coreiface.CoreAPI) error {
+func (settings *ipnsSettings) fillInDefaults() error {
 	fsys := settings.IPNS
 	if fsys.ctx == nil {
 		fsys.ctx, fsys.cancel = context.WithCancel(context.Background())
@@ -92,9 +92,6 @@ func (settings *ipnsSettings) fillInDefaults(core coreiface.CoreAPI) error {
 	if fsys.expiry == 0 {
 		fsys.expiry = 1 * time.Minute
 	}
-	if fsys.ipfs != nil {
-		return nil
-	}
 	return nil
 }