Fix warnings

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

Author: mrdrogdrog

src/components/editor-page/metadata-editor/metadata-editor.tsx

@@ -39,7 +39,6 @@ export interface SelectMetadataOptions<T> {
 export const MetadataEditor: React.FC<MetadataEditorProps> = ({ show, onHide }) => {
   const { t } = useTranslation()
   const yamlMetadata = useSelector((state: ApplicationState) => state.noteDetails.frontmatter)
-  const noteDetails = useSelector((state: ApplicationState) => state.noteDetails.markdownContent)
   /*const [yamlMetadata, setNoteFrontmatter] = useState<Omit<YAMLMetaData, 'opengraph'>>({
    title: "Test Title",
    description: "Test Description\nwith two lines",

src/components/editor-page/metadata-editor/string-metadata-textarea.tsx

@@ -10,7 +10,7 @@ import { MetadataInputFieldProps } from './metadata-editor'
 export const StringMetadataTextarea: React.FC<MetadataInputFieldProps<string>> = ({ frontmatterKey, content, onContentChange }) => {
   const onChange = useCallback((event: React.ChangeEvent<HTMLTextAreaElement>) => {
     onContentChange({ [frontmatterKey]: event.currentTarget.value })
-  }, [onContentChange])
+  }, [frontmatterKey, onContentChange])
 
   return (
     <textarea