Remove QT4 patch directory in the superbuild?

Description

Can I remove the QT4 patch directory in the superbuild as OTB 6.6 is only compatible qith QT5?

see: https://gitlab.orfeo-toolbox.org/orfeotoolbox/otb/tree/release-6.6/SuperBuild/patches/QT4

If a superbuild guru can tell me...

Steps to reproduce

Describe as precisely as possible how to reproduce the bug. Try to isolate a minimal number of steps. Also describe reproducibility (always, random ...).

Configuration information

OS, OTB version or tag, information related to build (binaries, superbuild, system libs ...)