fix(import): autofix missing shapes for sidebars and some sections as well (#2723)

packages/old-import/src/import-error.ts

@@ -1,4 +1,4 @@
-import type { BoardSize, OldmarrConfig } from "@homarr/old-schema";
+import type { OldmarrConfig } from "@homarr/old-schema";
 
 export class OldHomarrImportError extends Error {
   constructor(oldConfig: OldmarrConfig, cause: unknown) {
@@ -7,9 +7,3 @@ export class OldHomarrImportError extends Error {
     });
   }
 }
-
-export class OldHomarrScreenSizeError extends Error {
-  constructor(type: "app" | "widget", id: string, screenSize: BoardSize) {
-    super(`Screen size not found for type=${type} id=${id} screenSize=${screenSize}`);
-  }
-}