internal/registry: ParseRepositoryInfo: remove unused error return

Removed the error return from the `ParseRepositoryInfo` function.
There are no validation steps inside `ParseRepositoryInfo` which
could cause an error, so we always returned a nil error.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/plugin/install.go

@@ -66,8 +66,7 @@ func buildPullConfig(ctx context.Context, dockerCli command.Cli, opts pluginOpti
 		return client.PluginInstallOptions{}, err
 	}
 
-	repoInfo, _ := registry.ParseRepositoryInfo(ref)
-
+	repoInfo := registry.ParseRepositoryInfo(ref)
 	remote := ref.String()
 
 	_, isCanonical := ref.(reference.Canonical)