Remove QSvgNode::document()


It was slow and is obsolete now.

Pick-to: 6.12
Change-Id: I77ff1d5e88075a96b8239628e87d12f300abac76
Reviewed-by: Hatem ElKharashy <hatem.elkharashy@qt.io>
commiteffc94fe42b41462a7ae961ad3ebd26c6bdcd0a1
parent2cba6002dca3781bd9fe4de085c8df8673d4ecb8
authorRobert Löhning <robert.loehning@qt.io>
committerRobert Löhning <robert.loehning@qt.io>
commit timeFri, 25 Sep 2026 14:26:07 +0000