Replace std::unique_ptr with a custom implementation

<memory> is a costly header we can avoid by just implementing
UniquePtr ourselves, which is a pretty straightforward in modern
C++, this saves around 10% of the compilation time here.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/input_handler.cc b/src/input_handler.cc
index d5f010c7..0c501edb 100644
--- a/src/input_handler.cc
+++ b/src/input_handler.cc
@@ -205,7 +205,7 @@ struct MouseHandler
     }
 
 private:
-    std::unique_ptr<ScopedSelectionEdition> m_dragging;
+    UniquePtr<ScopedSelectionEdition> m_dragging;
     BufferCoord m_anchor;
 };