Drop the two recommendation type aliases the deleted card exported for

The schemas stay: the insight result still parses recommendations
through them. Only the exported aliases went unused once the card that
consumed them was removed, and the dead-code gate says so.

src/lib/ai/types.ts

@@ -33,10 +33,6 @@ export const insightRecommendationRationaleSchema = z.object({
   deviation: z.string(),
 });
 
-export type InsightRecommendationRationale = z.infer<
-  typeof insightRecommendationRationaleSchema
->;
-
 /**
  * v1.4.16 — recommendations can be either the legacy plain-string
  * shape OR a structured object carrying an optional medical-reference
@@ -77,8 +73,6 @@ export const insightRecommendationSchema = z.union([
   }),
 ]);
 
-export type InsightRecommendation = z.infer<typeof insightRecommendationSchema>;
-
 export const insightResultSchema = z.object({
   insightType: z.string().optional(),
   summary: z.string(),