Update CMake files after switch from CppUnit to Catch

Don't look for CppUnit library nor build it any longer, but just use the
Catch headers under 3rdparty/catch.

build/cmake/tests/CMakeLists.txt

@@ -7,81 +7,6 @@
 # Licence:     wxWindows licence
 #############################################################################
 
-# Find CPPUnit
-wx_add_thirdparty_library(wxUSE_CPPUNIT cppunit
-    "use cppunit (Used for unit tests)" DEFAULT sys)
-
-if(wxUSE_CPPUNIT STREQUAL "builtin")
-    # Build our own private copy if it could not be found in the system
-    message(STATUS "Could not find cppunit. Downloading and building local copy")
-    set(CPPUNIT_URL http://dev-www.libreoffice.org/src/cppunit-1.13.2.tar.gz)
-    set(CPPUNIT_MD5 d1c6bdd5a76c66d2c38331e2d287bc01)
-    add_library(cppunit STATIC IMPORTED)
-    if(MSVC AND DEFINED CMAKE_VS_MSBUILD_COMMAND)
-        # Build with VS 2010+
-        if(CMAKE_VS_PLATFORM_TOOLSET)
-            set(build_param_toolset /p:PlatformToolset=${CMAKE_VS_PLATFORM_TOOLSET})
-            if(MSVC_VERSION EQUAL 1700)
-                # VS11 requires an additional parameter to build VS10 project files
-                set(build_param_toolset ${build_param_toolset} /p:VisualStudioVersion=11.0)
-            endif()
-        else()
-            # Maybe empty with VS10, but that should be fine
-            # because the vcxproj is VS10
-            set(build_param_toolset)
-        endif()
-        ExternalProject_Add(cppunitlib
-            URL ${CPPUNIT_URL}
-            URL_MD5 ${CPPUNIT_MD5}
-            CONFIGURE_COMMAND ""
-            BUILD_IN_SOURCE 1
-            BUILD_COMMAND
-                ${CMAKE_VS_MSBUILD_COMMAND}
-                    src/cppunit/cppunit.vcxproj
-                    /p:Configuration=$<CONFIGURATION>
-                    /p:Platform=${CMAKE_VS_PLATFORM_NAME}
-                    ${build_param_toolset}
-            INSTALL_COMMAND
-                ${CMAKE_COMMAND} -E copy <SOURCE_DIR>/lib/cppunit$<$<CONFIG:Debug>:d>.lib <INSTALL_DIR>
-            COMMAND
-                ${CMAKE_COMMAND} -E copy_directory <SOURCE_DIR>/include <INSTALL_DIR>/include
-            )
-        ExternalProject_Get_Property(cppunitlib INSTALL_DIR)
-        set_target_properties(cppunit PROPERTIES
-            IMPORTED_LOCATION "${INSTALL_DIR}/cppunit.lib"
-            IMPORTED_LOCATION_DEBUG "${INSTALL_DIR}/cppunitd.lib"
-            )
-    elseif(UNIX)
-        # TODO: forward CC and CCFLAGS
-        ExternalProject_Add(cppunitlib
-            URL ${CPPUNIT_URL}
-            URL_MD5 ${CPPUNIT_MD5}
-            CONFIGURE_COMMAND <SOURCE_DIR>/configure
-                --prefix=<INSTALL_DIR>
-                --disable-shared
-                --disable-doxygen
-                --disable-html-docs
-            BUILD_COMMAND make
-            INSTALL_COMMAND make install
-            )
-        ExternalProject_Get_Property(cppunitlib INSTALL_DIR)
-        set_target_properties(cppunit PROPERTIES IMPORTED_LOCATION
-            "${INSTALL_DIR}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}cppunit${CMAKE_STATIC_LIBRARY_SUFFIX}")
-    else()
-        set(wxUSE_CPPUNIT OFF)
-    endif()
-
-    set(CPPUNIT_INCLUDE_DIR "${INSTALL_DIR}/include")
-    set(CPPUNIT_LIBRARIES cppunit)
-    add_dependencies(cppunit cppunitlib)
-elseif(wxUSE_CPPUNIT)
-    find_package(cppunit REQUIRED)
-endif()
-
-if(NOT wxUSE_CPPUNIT)
-    message(FATAL_ERROR "cppunit is required for tests. Please install cppunit or set wxBUILD_TESTS=OFF")
-endif()
-
 add_subdirectory(base)
 
 # Build GUI tests