diff --git a/dataweaver/apps/web/src/configs/mock_query.ts b/dataweaver/apps/web/src/configs/mock_query.ts
deleted file mode 100644
index cd8f464c..00000000
--- a/dataweaver/apps/web/src/configs/mock_query.ts
+++ /dev/null
@@ -1,141 +0,0 @@
-import type { AtlasContextProps } from '~/components/scopes/atlas/atlas_provider';
-import type { AtlasContent } from '~/components/scopes/atlas/helpers';
-
-/** The slice of the atlas the mock needs — just the ability to add cards. */
-type MockAtlas = Pick<AtlasContextProps, 'add'>;
-
-/** A canned query result: the single card a query resolves to. */
-interface MockResponse {
-  /** ms after the query starts when the card's data 'arrives'. */
-  delay: number;
-
-  /** The fully-populated content the card resolves to. */
-  content: AtlasContent;
-}
-
-const MOCK_RESPONSES: MockResponse[] = [
-  {
-    delay: 10000,
-    content: {
-      variant: 'text',
-      title: 'Key insights when evaluating greenhouse gas emissions',
-      body: 'Emissions per capita remain low relative to other regions, energy access is the dominant driver, and land-use change accounts for a large share of the total.',
-      relatedQuery: 'What are the key drivers of these trends?',
-    },
-  },
-  {
-    delay: 2500,
-    content: {
-      variant: 'chart',
-      title: 'CO₂ emissions in Africa',
-      description:
-        'Annual CO₂ emissions from fossil fuels and industry across Africa, in million tonnes.',
-      data: [
-        { date: '2000', value: 928 },
-        { date: '2003', value: 988 },
-        { date: '2006', value: 1085 },
-        { date: '2009', value: 1161 },
-        { date: '2012', value: 1264 },
-        { date: '2015', value: 1336 },
-        { date: '2018', value: 1391 },
-        { date: '2021', value: 1475 },
-      ],
-    },
-  },
-  {
-    delay: 1500,
-    content: {
-      variant: 'text',
-      title: 'Why European emissions have been falling',
-      body: 'A sustained shift away from coal, strong efficiency standards, and rapid renewable deployment have driven emissions down even as the economy has continued to grow.',
-      relatedQuery: 'Which policies drove the steepest cuts?',
-    },
-  },
-  {
-    delay: 2500,
-    content: {
-      variant: 'chart',
-      title: 'CO₂ emissions in Europe',
-      description:
-        'Annual CO₂ emissions from fossil fuels and industry across Europe, in million tonnes.',
-      data: [
-        { date: '2000', value: 6156 },
-        { date: '2003', value: 6391 },
-        { date: '2006', value: 6529 },
-        { date: '2009', value: 5893 },
-        { date: '2012', value: 5999 },
-        { date: '2015', value: 5613 },
-        { date: '2018', value: 5614 },
-        { date: '2021', value: 5265 },
-      ],
-      relatedQuery: 'How does this compare to other regions?',
-    },
-  },
-  {
-    delay: 1500,
-    content: {
-      variant: 'text',
-      title: 'What is driving emissions growth in Asia',
-      body: 'Rapid industrialisation, rising energy demand, and continued reliance on coal have made the region the largest contributor to global emissions growth over the past two decades.',
-      relatedQuery: 'How might this trajectory change?',
-    },
-  },
-  {
-    delay: 2500,
-    content: {
-      variant: 'chart',
-      title: 'CO₂ emissions in Asia',
-      description:
-        'Annual CO₂ emissions from fossil fuels and industry across Asia, in million tonnes.',
-      data: [
-        { date: '2000', value: 9331 },
-        { date: '2003', value: 11036 },
-        { date: '2006', value: 13391 },
-        { date: '2009', value: 15378 },
-        { date: '2012', value: 18438 },
-        { date: '2015', value: 19070 },
-        { date: '2018', value: 20366 },
-        { date: '2021', value: 21521 },
-      ],
-      relatedQuery: 'What would a lower-emissions pathway require?',
-    },
-  },
-];
-
-export type MockQueryCleanup = () => void;
-
-/**
- * Simulates a streaming query response using static data: a response is picked
- * at random, its cards are created in a loading state, then populated on a
- * delay to mimic data arriving over the wire. Returns a cleanup that cancels
- * any still-pending updates.
- *
- * TODO: Remove once `runPrompt` is backed by the real streaming query.
- */
-export const runMockQuery = (
-  _prompt: string,
-  atlas: MockAtlas,
-): MockQueryCleanup => {
-  const timeouts: ReturnType<typeof setTimeout>[] = [];
-
-  const cleanup = () => {
-    for (const timeout of timeouts) clearTimeout(timeout);
-  };
-
-  const randomIndex = Math.floor(Math.random() * MOCK_RESPONSES.length);
-  const randomResponse = MOCK_RESPONSES[randomIndex];
-  if (!randomResponse) return cleanup;
-
-  // Show the card immediately in a loading state, then reveal its content once
-  // the data 'arrives'. The follow-up is withheld until loading ends, so it
-  // only appears alongside the resolved content.
-  const { delay, content } = randomResponse;
-  const { variant, title, ...contentRest } = content;
-  const card = atlas.add({ variant, title, isLoading: true });
-
-  timeouts.push(
-    setTimeout(() => card.update({ isLoading: false, ...contentRest }), delay),
-  );
-
-  return cleanup;
-};