perf(boolean-intersects): replace redundant flattenEach with booleanDisjoint (#3103)

`booleanDisjoint` already compares every flattened geometry pair internally.
I also removed @turf/meta and @turf/helpers from the package's dependencies
since nothing in the package imports them anymore (helpers was unused even
before this change).

Benchmarks show between +50% and +100% improvement in speed on MacBook M4 Pro.

Co-authored-by: mfedderly <24275386+mfedderly@users.noreply.github.com>

Author: rexxars

packages/turf-boolean-intersects/index.ts

@@ -1,6 +1,5 @@
 import { Feature, Geometry } from "geojson";
 import { booleanDisjoint } from "@turf/boolean-disjoint";
-import { flattenEach } from "@turf/meta";
 
 /**
  * Boolean-intersects returns (TRUE) if the intersection of the two geometries is NOT an empty set.
@@ -36,18 +35,9 @@ function booleanIntersects(
     ignoreSelfIntersections?: boolean;
   } = {}
 ) {
-  let bool = false;
-  flattenEach(feature1, (flatten1) => {
-    flattenEach(feature2, (flatten2) => {
-      if (bool === true) {
-        return true;
-      }
-      bool = !booleanDisjoint(flatten1.geometry, flatten2.geometry, {
-        ignoreSelfIntersections,
-      });
-    });
-  });
-  return bool;
+  // booleanDisjoint already compares every flattened geometry pair, so
+  // intersects is simply its negation.
+  return !booleanDisjoint(feature1, feature2, { ignoreSelfIntersections });
 }
 
 export { booleanIntersects };

packages/turf-boolean-intersects/package.json

@@ -6,7 +6,8 @@
   "contributors": [
     "Rowan Winsemius <@rowanwins>",
     "Denis Carriere <@DenisCarriere>",
-    "David Whittingham <@01100100>"
+    "David Whittingham <@01100100>",
+    "Espen Hovlandsdal <@rexxars>"
   ],
   "license": "MIT",
   "bugs": {
@@ -67,8 +68,6 @@
   },
   "dependencies": {
     "@turf/boolean-disjoint": "workspace:*",
-    "@turf/helpers": "workspace:*",
-    "@turf/meta": "workspace:*",
     "@types/geojson": "catalog:",
     "tslib": "catalog:"
   }