Switch freecad.spec from OCE to opencascade (OCCT)

Signed-off-by: Przemo Firszt <przemo@firszt.eu>

package/fedora/freecad.spec

@@ -10,8 +10,6 @@
 %global plugins Drawing Fem FreeCAD Image Import Inspection Mesh MeshPart Part Points QtUnit Raytracing ReverseEngineering Robot Sketcher Start Web PartDesignGui _PartDesign Path PathGui Spreadsheet SpreadsheetGui area DraftUtils DraftUtils libDriver libDriverDAT libDriverSTL libDriverUNV libMEFISTO2 libSMDS libSMESH libSMESHDS libStdMeshers Measure TechDraw TechDrawGui libarea-native Surface SurfaceGui PathSimulator
 
 # Some configuration options for other environments
-# rpmbuild --with=occ:  Compile using OpenCASCADE instead of OCE
-%global occ %{?_with_occ: 1} %{?!_with_occ: 0}
 # rpmbuild --with=bundled_zipios:  use bundled version of zipios++
 %global bundled_zipios %{?_with_bundled_zipios: 1} %{?!_with_bundled_zipios: 0}
 # rpmbuild --without=bundled_pycxx:  don't use bundled version of pycxx
@@ -50,13 +48,7 @@ BuildRequires:  git
 
 BuildRequires:  Coin3-devel
 BuildRequires:  Inventor-devel
-%if %{occ}
-BuildRequires:  OpenCASCADE-devel
-%else
-BuildRequires:  OCE-devel
-BuildRequires:  OCE-draw
-%endif
-
+BuildRequires:  opencascade-devel
 BuildRequires:  boost-devel
 BuildRequires:  boost-python3-devel
 BuildRequires:  eigen3-devel
@@ -210,9 +202,7 @@ LDFLAGS='-Wl,--as-needed -Wl,--no-undefined'; export LDFLAGS
        -DCOIN3D_INCLUDE_DIR=%{_includedir}/Coin3 \
        -DCOIN3D_DOC_PATH=%{_datadir}/Coin3/Coin \
        -DFREECAD_USE_EXTERNAL_PIVY=TRUE \
-%if %{occ}
        -DUSE_OCC=TRUE \
-%endif
 %if ! %{bundled_smesh}
        -DFREECAD_USE_EXTERNAL_SMESH=TRUE \
        -DSMESH_FOUND=TRUE \