Do not update the mime, desktop and icon caches from the install step.

They run against CMAKE_INSTALL_PREFIX rather than DESTDIR, so they write to the
live filesystem instead of the image, which trips the sandbox. Gentoo already
refreshes all three from xdg.eclass's pkg_postinst.

--- a/src/ld-analyse/CMakeLists.txt
+++ b/src/ld-analyse/CMakeLists.txt
@@ -136,20 +136,6 @@
 	install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/install/ld-analyse.desktop
 		DESTINATION share/applications)
 	
-	# Post-install: update caches (only if update-* commands are available)
-	# These are safe to fail and won't hang
-	install(CODE "execute_process(COMMAND which update-mime-database OUTPUT_QUIET ERROR_QUIET RESULT_VARIABLE _have_update_mime)")
-	install(CODE "if(NOT _have_update_mime)
-		execute_process(COMMAND update-mime-database \${CMAKE_INSTALL_PREFIX}/share/mime OUTPUT_QUIET ERROR_QUIET)
-	endif()")
-	install(CODE "execute_process(COMMAND which update-desktop-database OUTPUT_QUIET ERROR_QUIET RESULT_VARIABLE _have_update_desktop)")
-	install(CODE "if(NOT _have_update_desktop)
-		execute_process(COMMAND update-desktop-database \${CMAKE_INSTALL_PREFIX}/share/applications OUTPUT_QUIET ERROR_QUIET)
-	endif()")
-	install(CODE "execute_process(COMMAND which gtk-update-icon-cache OUTPUT_QUIET ERROR_QUIET RESULT_VARIABLE _have_gtk_icon)")
-	install(CODE "if(NOT _have_gtk_icon)
-		execute_process(COMMAND gtk-update-icon-cache -f -t \${CMAKE_INSTALL_PREFIX}/share/icons/hicolor OUTPUT_QUIET ERROR_QUIET)
-	endif()")
 else()
 	install(
 			TARGETS ld-analyse