basegfx: avoid -Werror=deprecated-copy (GCC trunk towards GCC 9)

...by removing explicitly user-provided functions that do the same as their
implicitly-defined counterparts, but may prevent implicitly declared copy
functions from being defined as non-deleted in the future

Change-Id: I88d3024ddfa51fc32de71af50cdfadb16ff93ffd
Reviewed-on: https://gerrit.libreoffice.org/58066
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

include/basegfx/point/b3dpoint.hxx

@@ -64,15 +64,6 @@ namespace basegfx
         :   B3DTuple(fX, fY, fZ)
         {}
 
-        /** Create a copy of a 3D Point
-
-            @param rVec
-            The 3D Point which will be copied.
-        */
-        B3DPoint(const B3DPoint& rVec)
-        :   B3DTuple(rVec)
-        {}
-
         /** constructor with tuple to allow copy-constructing
             from B3DTuple-based classes
         */

include/basegfx/vector/b3dvector.hxx

@@ -64,15 +64,6 @@ namespace basegfx
         :   B3DTuple(fX, fY, fZ)
         {}
 
-        /** Create a copy of a 3D Vector
-
-            @param rVec
-            The 3D Vector which will be copied.
-        */
-        B3DVector(const B3DVector& rVec)
-        :   B3DTuple(rVec)
-        {}
-
         /** constructor with tuple to allow copy-constructing
             from B3DTuple-based classes
         */