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/cctv/geometry.js

@@ -1,7 +1,6 @@
 import * as Cesium from 'cesium';
 import { createFrustumVolumePrimitive } from '../../data/cctvViewshed.js';
 import {
-  PROJECTION_VERT_ASPECT,
   FRUSTUM_GROUND_CLEARANCE_M,
   PROBE_MIN_RANGE_M,
   PROBE_CLEARANCE_M,