Remove dead code after PrefetchTiles refactoring.

PrefetchTilesProvider class is obsolete and was removed as
VersionedLayerClient::PrefetchTiles now uses direct API calls and
TaskScheduler for async work.
Additionaly this also adapts PrefetchTilesRepository class to coding
style and removed unnecessary headers and forward declarations from
CatalogClientImpl and VersionedLayerClientImpl.

Relates-to: OLPEDGE-1005

Signed-off-by: Andrei Popescu <[email protected]>

Author: Andrei Popescu

olp-cpp-sdk-dataservice-read/src/CatalogClientImpl.h

@@ -24,12 +24,10 @@
 
 #include <olp/core/client/CancellationToken.h>
 #include <olp/core/client/HRN.h>
-#include <olp/dataservice/read/CatalogClient.h>
+#include <olp/core/client/OlpClientSettings.h>
 #include <olp/dataservice/read/CatalogRequest.h>
 #include <olp/dataservice/read/CatalogVersionRequest.h>
-#include <olp/dataservice/read/DataRequest.h>
-#include <olp/dataservice/read/PartitionsRequest.h>
-#include <olp/dataservice/read/PrefetchTilesRequest.h>
+#include <olp/dataservice/read/Types.h>
 
 namespace olp {
 namespace client {
@@ -40,12 +38,8 @@ class PendingRequests;
 
 namespace dataservice {
 namespace read {
-
-class PrefetchTilesProvider;
 namespace repository {
 class CatalogRepository;
-class PartitionsRepository;
-class DataRepository;
 }  // namespace repository
 
 class CatalogClientImpl final {