chore(mothership): drop unused worker contract copies

apps/sim/lib/mothership/generated/protocol.ts

@@ -496,13 +496,6 @@ export const TitleRequest = z.strictObject({
 });
 export type TitleRequest = z.infer<typeof TitleRequest>;
 
-/** The 409 body for a duplicate send while a sibling instance streams (S32). */
-export interface ActiveStreamConflict {
-  error: "active_stream";
-  streamId: string;
-  status: string;
-}
-
 /** The 426 body for protocol version skew (S43). */
 export interface ProtocolMismatch {
   error: "protocol_version_mismatch";

knip.jsonc

@@ -36,11 +36,7 @@
         // Compile-time fixture compatibility assertion, included by tsconfig.
         "lib/table/fixture-contract.ts",
         // scripts/generate-docs.ts imports this through pathToFileURL.
-        "app/(landing)/integrations/data/landing-content.ts",
-        // Mirrored from the sibling worker's contracts:sync, not app-owned.
-        "lib/mothership/generated/account.ts",
-        "lib/mothership/generated/local-files.ts",
-        "lib/mothership/generated/computer-use.ts"
+        "app/(landing)/integrations/data/landing-content.ts"
       ],
       // Required/discoverable barrels whose children have direct live imports.
       // Ignore only the barrel file finding, so it cannot keep dead children alive.