Revert "fix: jwt guard when unauthenticated shares are allowed"

This reverts commit c2b87aba5c.

backend/src/auth/guard/jwt.guard.ts

@@ -9,9 +9,8 @@ export class JwtGuard extends AuthGuard("jwt") {
   canActivate(
     context: ExecutionContext
   ): boolean | Promise<boolean> | Observable<boolean> {
-    return (
-      super.canActivate(context) ||
-      process.env.ALLOW_UNAUTHENTICATED_SHARES == "true"
-    );
+    return process.env.ALLOW_UNAUTHENTICATED_SHARES == "true"
+      ? true
+      : super.canActivate(context);
   }
 }