chore(quality): prune stale ESLint suppressions (4,273 -> 4,233)

Entries whose violations no longer exist (cleaned by cycle merges and the
pre-flight fixes) made 'npm run lint' exit 2 with 'suppressions left that do
not occur anymore'. Regenerated via --prune-suppressions; net-new policy
unchanged.

config/quality/eslint-suppressions.json

@@ -242,11 +242,6 @@
       "count": 1
     }
   },
-  "src/app/(dashboard)/dashboard/settings/components/ComboDefaultsTab.tsx": {
-    "no-restricted-syntax": {
-      "count": 1
-    }
-  },
   "src/app/(dashboard)/dashboard/settings/components/ModelLockoutCard.tsx": {
     "react-hooks/exhaustive-deps": {
       "count": 1
@@ -1562,11 +1557,6 @@
       "count": 2
     }
   },
-  "tests/unit/messages-count-tokens-route.test.ts": {
-    "@typescript-eslint/no-explicit-any": {
-      "count": 4
-    }
-  },
   "tests/unit/mimocode-executor.test.ts": {
     "@typescript-eslint/no-explicit-any": {
       "count": 58