Fix merge

vizro-core/src/vizro/models/_dashboard.py

@@ -172,12 +172,7 @@ def build(self):
                 dash.page_container,
             ],
         )
-        return dmc.MantineProvider(
-            layout,
-            # Use the `theme` to style all Mantine components with a Vizro theme. For more info see https://www.dash-mantine-components.com/components/mantineprovider
-            theme={"primaryColor": "gray"},
-        )
-
+
         # children=[layout] as a list rather than children=layout, so that app.dash.layout.children.append works to
         # easily add things to the Dash layout. In future we might have a neater function for patching components into
         # the Dash layout in which case this could change.