Drop o3tl::optional wrapper

...now that macOS builds are guaranteed to have std::optional since
358146bbbd1b9775c12770fb5e497b6ec5adfc51 "Bump macOS build baseline to
Xcode 11.3 and macOS 10.14.4".

The change is done mostly mechanically with

> for i in $(git grep -Fl optional); do
>  sed -i -e 's:<o3tl/optional\.hxx>\|\"o3tl/optional\.hxx\":<optional>:' \
>   -e 's/\<o3tl::optional\>/std::optional/g' \
>   -e 's/\<o3tl::make_optional\>/std::make_optional/g' "$i"
> done
> for i in $(git grep -Flw o3tl::nullopt); do
>  sed -i -e 's/\<o3tl::nullopt\>/std::nullopt/g' "$i"
> done

(though that causes some of the resulting

  #include <optional>

to appear at different places relative to other includes than if they had been
added manually), plus a few manual modifications:

* adapt bin/find-unneeded-includes
* adapt desktop/IwyuFilter_desktop.yaml
* remove include/o3tl/optional.hxx
* quote resulting "<"/">" as "&lt;"/"&gt;" in officecfg/registry/cppheader.xsl
* and then solenv/clang-format/reformat-formatted-files

Change-Id: I68833d9f7945e57aa2bc703349cbc5a56b342273
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/89165
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

2 files changed, 4 insertions, 4 deletions

diff --git a/cppcanvas/source/inc/canvasgraphichelper.hxx b/cppcanvas/source/inc/canvasgraphichelper.hxx
index c1c23657a3f4..15ac6d825d5b 100644
--- a/cppcanvas/source/inc/canvasgraphichelper.hxx
+++ b/cppcanvas/source/inc/canvasgraphichelper.hxx
@@ -25,7 +25,7 @@
 #include <cppcanvas/canvasgraphic.hxx>
 #include <cppcanvas/canvas.hxx>
 
-#include <o3tl/optional.hxx>
+#include <optional>
 
 namespace com { namespace sun { namespace star { namespace rendering
 {
@@ -61,7 +61,7 @@ namespace cppcanvas
         private:
             mutable css::rendering::RenderState                                   maRenderState;
 
-            o3tl::optional<basegfx::B2DPolyPolygon>                              maClipPolyPolygon;
+            std::optional<basegfx::B2DPolyPolygon>                              maClipPolyPolygon;
             CanvasSharedPtr                                                       mpCanvas;
         };
 
diff --git a/cppcanvas/source/wrapper/implcanvas.hxx b/cppcanvas/source/wrapper/implcanvas.hxx
index a75b853f2c08..859f595cb61f 100644
--- a/cppcanvas/source/wrapper/implcanvas.hxx
+++ b/cppcanvas/source/wrapper/implcanvas.hxx
@@ -24,7 +24,7 @@
 #include <com/sun/star/rendering/ViewState.hpp>
 #include <cppcanvas/canvas.hxx>
 
-#include <o3tl/optional.hxx>
+#include <optional>
 #include <basegfx/polygon/b2dpolypolygon.hxx>
 
 
@@ -77,7 +77,7 @@ namespace cppcanvas
 
         private:
             mutable css::rendering::ViewState                    maViewState;
-            o3tl::optional<basegfx::B2DPolyPolygon>             maClipPolyPolygon;
+            std::optional<basegfx::B2DPolyPolygon>             maClipPolyPolygon;
             const css::uno::Reference< css::rendering::XCanvas > mxCanvas;
         };