revert: add restriction callback to restrict visibility and modification of widget kinds (#2746)

This reverts commit 84f73d33a0.

packages/auth/permissions/index.ts

@@ -1,3 +1,2 @@
 export * from "./board-permissions";
 export * from "./integration-permissions";
-export * from "./widget-restriction";

packages/auth/permissions/widget-restriction.ts

@@ -1,14 +0,0 @@
-import type { Session } from "next-auth";
-
-import type { WidgetDefinition } from "../../widgets/src";
-import type { RestrictionLevel } from "../../widgets/src/definition";
-
-export const isWidgetRestricted = <TDefinition extends WidgetDefinition>(props: {
-  definition: TDefinition;
-  user: Session["user"] | null;
-  check: (level: RestrictionLevel) => boolean;
-}) => {
-  if (!("restrict" in props.definition)) return false;
-  if (props.definition.restrict === undefined) return false;
-  return props.check(props.definition.restrict({ user: props.user ?? null }));
-};