To unlink your components from stories, you can go into the Storybook integration page by selecting the “Manage links” option under the settings of the integration.
On this page, you can select a story that you want to unlink from the left panel and click on the “Edit” button on the right top. Then, under the Component in Zeplin section, you will see the “unlink this story” link that unlinks all components linked to that story.
You can also de-select the linked components and select the components you want to keep their links, except the ones you want to exclude. Then, when you click on the “Confirm” button, the components you newly selected will be linked to that story.