We depend against 5.7 now

CMakeLists.txt

@@ -151,10 +151,6 @@ if (NOT ${MIMETREEPARSER_ONLY_BUILD})
     else()
         if (${Qt5WebEngine_VERSION} GREATER "5.6.99")
             MESSAGE(STATUS "QtWebEngine 5.7.0 doesn't provide printing support. It has a lot of regression. Better to upgrade QtWebEngine to 5.8.0")
-        else()
-            if (${Qt5WebEngine_VERSION} GREATER "5.5.99")
-                MESSAGE(STATUS "WARNING !!!!!!!!!!!!!!!!!!!!!!!!!! QtWebEngine doesn't have good support in 5.6.0. Kmail will be limited with this old version.!!!!!!!!!!!!!!!!")
-            endif()
         endif()
     endif()
 endif()