Putting `inline` on the definition and not the declaration could cause
some issues with some compilers, e.g. MinGW[1].
Putting `inline` on a method's declaration and definition is redundant;
I am not sure if that could cause an issue with MinGW, but just in-class
on the declaration is enough/more-idiomatic.
Amends a5953d20e2.
Found in API review.
[1] https://wiki.qt.io/Things_To_Look_Out_For_In_Reviews#Methods item
1.2
Change-Id: Ieaba422670261330b5558f60dce2fcca2cb2723b
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
(cherry picked from commit 77f5846d213b8355d369695c68d585d0d5fa47ce)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
ea138d7557