style: remove private getter for getInstructions

src/server/index.ts

@@ -241,7 +241,7 @@ export class Server<
         : LATEST_PROTOCOL_VERSION,
       capabilities: this.getCapabilities(),
       serverInfo: this._serverInfo,
-      ...(this.getInstructions() && { instructions: this.getInstructions() }),
+      ...(this._instructions && { instructions: this._instructions }),
     };
   }
 
@@ -263,10 +263,6 @@ export class Server<
     return this._capabilities;
   }
 
-  private getInstructions(): string | undefined {
-    return this._instructions;
-  }
-
   async ping() {
     return this.request({ method: "ping" }, EmptyResultSchema);
   }