catalog: remove plugin export

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.changeset/thick-tools-tan.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog': minor
+---
+
+**BREAKING**: Removed the old `plugin` export, use `catalogPlugin` instead.

plugins/catalog/api-report.md

@@ -80,7 +80,7 @@ export interface CatalogKindHeaderProps {
 }
 
 // @public (undocumented)
-const catalogPlugin: BackstagePlugin<
+export const catalogPlugin: BackstagePlugin<
   {
     catalogIndex: RouteRef<undefined>;
     catalogEntity: RouteRef<{
@@ -101,8 +101,6 @@ const catalogPlugin: BackstagePlugin<
     >;
   }
 >;
-export { catalogPlugin };
-export { catalogPlugin as plugin };
 
 // @public (undocumented)
 export function CatalogResultListItem(

plugins/catalog/src/index.ts

@@ -35,7 +35,6 @@ export {
   CatalogEntityPage,
   CatalogIndexPage,
   catalogPlugin,
-  catalogPlugin as plugin,
   EntityAboutCard,
   EntityDependencyOfComponentsCard,
   EntityDependsOnComponentsCard,