test: remove per-test deadlines owned by project policy

Explicit deadlines at or below the project deadline only shortened it:
a literal 30-second value also disabled the coverage scaling, which timed
out wide-capacity regressions on main. Workloads above the built
deadline use the long-running tag. Deadlines derived from an operation
budget remain.

Co-Authored-By: gensokyo-dev <342580529+gensokyo-dev@users.noreply.github.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/boundary/sqlite/sqliteDatabaseBusy.test.ts

@@ -159,5 +159,4 @@ it.runIf(process.platform === "win32")(
     expectRetryableBusy(result.error, database.path);
     await expectRootsRemoved(roots);
   },
-  20_000,
 );