fix: use existing SP abreviation for block

src/game/grid.cpp

@@ -12,7 +12,7 @@
     }
 
     int layers = -1;
-    std::vector<BlockSP> blocks;
+    std::vector<Block::SP> blocks;
     std::string line, token;
 
     // Get the number of layers
@@ -171,7 +171,7 @@ void Grid::place(Vector2D game_window_size)
     Vector2D last_position{game_window_size / 2.0f};
     Vector2D first_of_layer{last_position};
 
-    auto common = [&](BlockSP & block){
+    auto common = [&](Block::SP & block){
         block->set_rotation_radians(std::numbers::pi*0.5f);
         block->set_scale(scale);
     };

src/game/grid.hpp

@@ -10,10 +10,9 @@
 class Grid
 {
 private:
-    using BlockSP = std::shared_ptr<Block>;
     const int layers_;
-    const std::vector<BlockSP> blocks_;
-    Grid(int layers, std::vector<BlockSP> blocks) : layers_(layers), blocks_(std::move(blocks)){}
+    const std::vector<Block::SP> blocks_;
+    Grid(int layers, std::vector<Block::SP> blocks) : layers_(layers), blocks_(std::move(blocks)){}
 
 public:
     Grid() = delete;