CI: Remove use_virtuals at GCC5.2 build

10 jobs for fix-gcc5-2-build
Status Name Job ID Coverage
  External
passed cdash-buildbot

passed vtk-m-dragnipur-osx-shared-debug+32bit_ids+64bit_coords+clang+tbb

00:09:38

passed vtk-m-dragnipur-osx-static-release+64bit_coords+clang+tbb

00:00:16

passed vtk-m-osheim-windows-shared-debug+ninja-vs-2017+tbb

00:20:46

passed vtk-m-osheim-windows-static-release+ninja-vs-2017+tbb

00:01:47

passed cdash-buildbot

passed vtk-m-dragnipur-osx-shared-debug+32bit_ids+64bit_coords+clang+tbb

00:01:15

passed vtk-m-dragnipur-osx-static-release+64bit_coords+clang+tbb

00:00:16

passed vtk-m-osheim-windows-shared-debug+ninja-vs-2017+tbb

00:06:48

passed vtk-m-osheim-windows-static-release+ninja-vs-2017+tbb

00:00:40