Disable ESLint error

ESLint reports that this function doesn't have a `return` statement, but
it does. It's possible ESLint thinks the switch might not be exhaustive,
but it is and TypeScript is able to verify this. Therefore it may be an
issue with the integration between TS and ESLint.

Author: JamieB-gu

dotcom-rendering/src/layouts/GalleryLayout.tsx

@@ -516,6 +516,10 @@ const Body = (props: {
 					element._type !==
 						'model.dotcomrendering.pageElements.AdPlaceholderBlockElement',
 			)
+			/* eslint-disable-next-line array-callback-return -- ESLint bug,
+			 * this function does contain `return` statements. TypeScript will
+			 * confirm the switch is exhaustive, but it's possible ESLint does
+			 * not know this. */
 			.map((element, index) => {
 				switch (element._type) {
 					case 'model.dotcomrendering.pageElements.ImageBlockElement':