chore: remove unused imports and local helpers

Drop module-local helpers that nothing calls (linkAbort, summarize,
stringOption, summarizeEntity and the polygonCenter, propertyObject and
unwrapProperties helpers only it used, CALLOUT_DOT_SIZE_PX) and unused
import specifiers in runtime modules, tests, QA scripts and tools.

None of the removed bindings is exported. Re-exports such as the ALPR
policy constants and every package export are unchanged.

src/layers/alpr/index.js

@@ -3,16 +3,12 @@ import * as Cesium from 'cesium';
 import {
   LAYER_ID,
   REQUEST_DEBOUNCE_MS,
-  QUERY_LIMIT,
-  MAX_RENDERED,
-  QUERY_SNAP_DEGREES,
   QUERY_REUSE_MS,
   ALPR_COLOR,
 } from './policy.js';
 import {
   snapAlprBox,
   boxContains,
-  destinationPointDeg,
   alprRetryDelayMs,
   validateAlprSnapshot,
   alprCreditMarkup,