[Dependency: Quadtree] Remove unused code from cache controller (#3163)

Author: Vivek Maskara

app/src/main/java/fr/free/nrw/commons/caching/CacheController.java

@@ -16,16 +16,14 @@
 @Singleton
 public class CacheController {
 
-    private final GpsCategoryModel gpsCategoryModel;
     private final QuadTree<List<String>> quadTree;
     private double x, y;
     private double xMinus, xPlus, yMinus, yPlus;
 
     private static final int EARTH_RADIUS = 6378137;
 
     @Inject
-    CacheController(GpsCategoryModel gpsCategoryModel) {
-        this.gpsCategoryModel = gpsCategoryModel;
+    CacheController() {
         quadTree = new QuadTree<>(-180, -90, +180, +90);
     }
 
@@ -36,17 +34,6 @@ public void setQtPoint(double decLongitude, double decLatitude) {
         Timber.d("X (longitude) value: %f, Y (latitude) value: %f", x, y);
     }
 
-    public void cacheCategory() {
-        List<String> pointCatList = new ArrayList<>();
-        if (gpsCategoryModel.getGpsCatExists()) {
-            pointCatList.addAll(gpsCategoryModel.getCategoryList());
-            Timber.d("Categories being cached: %s", pointCatList);
-        } else {
-            Timber.d("No categories found, so no categories cached");
-        }
-        quadTree.set(x, y, pointCatList);
-    }
-
     public List<String> findCategory() {
         Point<List<String>>[] pointsFound;
         //Convert decLatitude and decLongitude to a coordinate offset range