Remove old CMake cruft.

REVIEW: 120566

phonon/CMakeLists.txt

@@ -1,19 +1,8 @@
-# If you want to build kdebase without any multimedia support
-# define the cmake variable KDEBASE_DISABLE_MULTIMEDIA, i.e,
-# % cmake -DKDEBASE_DISABLE_MULTIMEDIA=ON
-#
 add_definitions(-DQT_USE_FAST_CONCATENATION -DQT_USE_FAST_OPERATOR_PLUS)
 
 find_package(Phonon4Qt5 4.6.60 NO_MODULE)
 include_directories(BEFORE ${PHONON_INCLUDES})
 
-option(KDEBASE_DISABLE_MULTIMEDIA "Disable multimedia support (default: off)" OFF)
-if(KDE4_DISABLE_MULTIMEDIA)
-    message(STATUS "*********** The switch KDE4_DISABLE_MULTIMEDIA is not supported anymore, use KDEBASE_DISABLE_MULTIMEDIA instead ************")
-endif()
-
-if(KDEBASE_DISABLE_MULTIMEDIA)
-    message(STATUS "NOTICE: Multimedia support DISABLED (KDEBASE_DISABLE_MULTIMEDIA == ON)")
-else()
+if(Phonon4Qt5_FOUND)
     add_subdirectory(platform_kde)
 endif()