remove unused in other files + remove Light* (not ready yet)

Author: jube

docs/snippets/doc_class_clock.cc

@@ -19,7 +19,9 @@
  * 3. This notice may not be removed or altered from any source distribution.
  */
 #include <gf/Clock.h>
-#include <gf/Unused.h>
+
+template <typename... Args>
+constexpr void unused(Args&&...) { }
 
 void dummyClockUsage() {
 
@@ -31,6 +33,5 @@ void dummyClockUsage() {
   gf::Time time2 = clock.restart();
   /// [clock]
 
-  gf::unused(clock, time1, time2);
-
+  unused(clock, time1, time2);
 }

docs/snippets/doc_class_console.cc

@@ -20,7 +20,9 @@
  */
 #include <gf/Color.h>
 #include <gf/Console.h>
-#include <gf/Unused.h>
+
+template <typename... Args>
+constexpr void unused(Args&&...) { }
 
 void dummyConsoleUsage(gf::ConsoleFont& font) {
   gf::Vector2i size(70, 40);
@@ -33,5 +35,5 @@ void dummyConsoleUsage(gf::ConsoleFont& font) {
   console.print({ 1, 1 }, style, "String with a %cred%c word.", gf::ConsoleColorControl1, gf::ConsoleColorControlStop);
   /// [console]
 
-  gf::unused(console);
+  unused(console);
 }

docs/snippets/doc_class_cursor.cc

@@ -19,7 +19,6 @@
  * 3. This notice may not be removed or altered from any source distribution.
  */
 #include <gf/Cursor.h>
-#include <gf/Unused.h>
 #include <gf/Window.h>
 
 void dummyCursorUsage(gf::Window& window) {

docs/snippets/doc_class_drawable.cc

@@ -22,7 +22,6 @@
 #include <gf/RenderTarget.h>
 #include <gf/Sprite.h>
 #include <gf/Texture.h>
-#include <gf/Unused.h>
 #include <gf/VertexArray.h>
 
 /// [mydrawable]

docs/snippets/doc_class_entity_container.cc

@@ -20,7 +20,6 @@
  */
 #include <gf/Entity.h>
 #include <gf/EntityContainer.h>
-#include <gf/Unused.h>
 
 /// [entity]
 class Foo : public gf::Entity {

docs/snippets/doc_class_flags.cc

@@ -19,7 +19,9 @@
  * 3. This notice may not be removed or altered from any source distribution.
  */
 #include <gf/Flags.h>
-#include <gf/Unused.h>
+
+template <typename... Args>
+constexpr void unused(Args&&...) { }
 
 /// [flags_def]
 enum class AnimalProperties {
@@ -48,13 +50,13 @@ void dummyFlagsUsage() {
   bool b = seahawk.test(AnimalProperties::HasClaws); // false
   /// [flags_usage]
 
-  gf::unused(b);
+  unused(b);
 
   /// [flags_all_none]
   gf::Flags<AnimalProperties> unicorn(gf::All);
 
   gf::Flags<AnimalProperties> rat(gf::None);
   /// [flags_all_none]
 
-  gf::unused(unicorn, rat);
+  unused(unicorn, rat);
 }

docs/snippets/doc_class_font.cc

@@ -20,7 +20,6 @@
  */
 #include <gf/Font.h>
 #include <gf/Text.h>
-#include <gf/Unused.h>
 
 void dummyFontUsage() {
   /// [font]

docs/snippets/doc_class_image.cc

@@ -19,7 +19,6 @@
  * 3. This notice may not be removed or altered from any source distribution.
  */
 #include <gf/Image.h>
-#include <gf/Unused.h>
 
 void dummyImageUsage() {
 

docs/snippets/doc_class_rect.cc

@@ -19,7 +19,9 @@
  * 3. This notice may not be removed or altered from any source distribution.
  */
 #include <gf/Rect.h>
-#include <gf/Unused.h>
+
+template <typename... Args>
+constexpr void unused(Args&&...) { }
 
 void dummyRectUsage() {
   /// [rect]
@@ -41,5 +43,5 @@ void dummyRectUsage() {
   // result == (4, 2, 16, 3)
   /// [rect]
 
-  gf::unused(b1, b2, b3);
+  unused(b1, b2, b3);
 }

docs/snippets/doc_class_sprite.cc

@@ -20,7 +20,6 @@
  */
 #include <gf/RenderTarget.h>
 #include <gf/Sprite.h>
-#include <gf/Unused.h>
 
 void dummySpriteUsage(gf::RenderTarget& renderer) {
   /// [sprite]