Revert "increase location threashold (#451)"

This reverts commit af82312.

lib/runtime/primitive_ops.ts

@@ -92,10 +92,10 @@ function locationEquals(a : LocationLike, b : LocationLike) : boolean {
         return true;
     if (a.x === b.x && a.y === b.y)
         return true;
+    //console.log('Comparing locations', [a,b]);
     const d = distance(a, b);
-    // location distance by default is set to 10 km
-    // TODO: in the future, support the ability for developers to specify this number in manifest.tt
-    return d <= 10000;
+    //console.log('Distance (m): ' + d.toFixed(2));
+    return d <= 2500;
 }
 
 function hasValueOf(x : unknown) : x is number|string|Date|Time|StringLike {