csync: remove PLUGIN install patch from cmake files

This conflicts with the KDE_INSTALL_PLUGINDIR and prevent the
dolphin plugin to be installed at the right location.

Since csync no longer have plugin, this can be removed

cmake/modules/DefineInstallationPaths.cmake

@@ -41,10 +41,6 @@ if (UNIX)
 	  "${LIB_INSTALL_DIR}"
 	  CACHE PATH "The subdirectory relative to the install prefix where private libs are installed"
 	  )
-  SET(PLUGIN_INSTALL_DIR
-    "${LIB_INSTALL_DIR}"
-    CACHE PATH "The subdirectory relative to the install prefix where plugins will be installed (default is prefix/lib/${APPLICATION_SHORTNAME})"
-  )
   SET(INCLUDE_INSTALL_DIR
     "${CMAKE_INSTALL_PREFIX}/include"
     CACHE PATH "The subdirectory to the header prefix (default prefix/include)"
@@ -106,7 +102,6 @@ if (WIN32)
   set(SBIN_INSTALL_DIR "." CACHE PATH "-")
   set(LIB_INSTALL_DIR "lib" CACHE PATH "-")
   set(INCLUDE_INSTALL_DIR "include" CACHE PATH "-")
-  set(PLUGIN_INSTALL_DIR "plugins" CACHE PATH "-")
   set(HTML_INSTALL_DIR "doc/HTML" CACHE PATH "-")
   set(ICON_INSTALL_DIR "." CACHE PATH "-")
   set(SOUND_INSTALL_DIR "." CACHE PATH "-")

csync/ConfigureChecks.cmake

@@ -9,7 +9,6 @@ set(PACKAGE ${APPLICATION_NAME})
 set(VERSION ${APPLICATION_VERSION})
 set(DATADIR ${DATA_INSTALL_DIR})
 set(LIBDIR ${LIB_INSTALL_DIR})
-set(PLUGINDIR "${PLUGIN_INSTALL_DIR}-${LIBRARY_SOVERSION}")
 set(SYSCONFDIR ${SYSCONF_INSTALL_DIR})
 
 set(BINARYDIR ${CMAKE_CURRENT_BINARY_DIR})

csync/config_csync.h.cmake

@@ -2,7 +2,6 @@
 #cmakedefine VERSION "${APPLICATION_VERSION}"
 #cmakedefine LOCALEDIR "${LOCALE_INSTALL_DIR}"
 #cmakedefine LIBDIR "${LIBDIR}"
-#cmakedefine PLUGINDIR "${PLUGINDIR}"
 #cmakedefine SYSCONFDIR "${SYSCONFDIR}"
 #cmakedefine BINARYDIR "${BINARYDIR}"
 #cmakedefine SOURCEDIR "${SOURCEDIR}"