[core] Remove unnecessary explicit destructors

src/mbgl/tile/raster_tile_data.cpp

@@ -55,10 +55,6 @@ void RasterTileData::setData(std::shared_ptr<const std::string> data,
     });
 }
 
-RasterTileData::~RasterTileData() {
-    cancel();
-}
-
 Bucket* RasterTileData::getBucket(const style::Layer&) {
     return bucket.get();
 }

src/mbgl/tile/raster_tile_data.hpp

@@ -21,7 +21,6 @@ public:
     RasterTileData(const OverscaledTileID&,
                    const style::UpdateParameters&,
                    const Tileset&);
-    ~RasterTileData();
 
     void setNecessity(Necessity) final;
 

src/mbgl/tile/vector_tile_data.cpp

@@ -15,8 +15,6 @@ VectorTileData::VectorTileData(const OverscaledTileID& id_,
       tileSource(*this, id_, parameters, tileset) {
 }
 
-VectorTileData::~VectorTileData() = default;
-
 void VectorTileData::setNecessity(Necessity necessity) {
     tileSource.setNecessity(static_cast<TileSource<VectorTileData>::Necessity>(necessity));
 }

src/mbgl/tile/vector_tile_data.hpp

@@ -18,7 +18,6 @@ public:
                    std::string sourceID,
                    const style::UpdateParameters&,
                    const Tileset&);
-    ~VectorTileData();
 
     void setNecessity(Necessity) final;
     void setData(std::shared_ptr<const std::string> data,