Revert "It compiles fine without deprecated method"

It compiles fine in local but not in CI

This reverts commit 3407c30f.

CMakeLists.txt

@@ -50,7 +50,7 @@ add_definitions(-DTRANSLATION_DOMAIN=\"libkcalutils5\")
 add_definitions(-DQT_NO_FOREACH)
 add_definitions(-DQT_NO_KEYWORDS)
 
-add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x050f00)
+add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x050e00)
 add_definitions(-DKF_DISABLE_DEPRECATED_BEFORE_AND_AT=0x054E00)
 
 if(BUILD_TESTING)