Fix pasted clips with negative speed have wrong in/out.

CCBUG: 417143

src/timeline2/model/timelinefunctions.cpp

@@ -1446,12 +1446,6 @@ bool TimelineFunctions::pasteClips(const std::shared_ptr<TimelineItemModel> &tim
             in = 0;
             timeline->m_allClips[newId]->m_producer->set("length", out + 1);
         }
-        if (speed < 0) {
-            // on negative speed clips, in/out are inverted
-            int length = out - in;
-            in = timeline->m_allClips[newId]->getMaxDuration() - out;
-            out = in + length;
-        }
         timeline->m_allClips[newId]->setInOut(in, out);
         int targetId = prod.attribute(QStringLiteral("id")).toInt();
         correspondingIds[targetId] = newId;