As pointed out by Thiago the QT_DECLARE_METATYPE calls are redundant, so
remove them.
Task-number: QTBUG-132101
Change-Id: I73800e70d3f270fb87941d4e053aa7ac5ed1841c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 3bb4c4949fed9ccf8653151c78d5130b8db00716)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit 01edc916d210238a06a043c1f8f9f44d69113ce2)