fix: optimization: PVS-Studio warning V832

It's better to use '= default;' syntax instead of empty constructor and destructor body.
Using '= default;' can help the compiler generate more optimal code.

Reported by: PVS-Studio

Signed-off-by: Vyacheslav Ivanov <islavaivanov76@gmail.com>

src/graphics/core/Font.cpp

@@ -12,8 +12,7 @@ Font::Font(std::vector<std::unique_ptr<Texture>> pages, int lineHeight, int yoff
     : lineHeight(lineHeight), yoffset(yoffset), pages(std::move(pages)) {
 }
 
-Font::~Font(){
-}
+Font::~Font() = default;
 
 int Font::getYOffset() const {
     return yoffset;