Remove qtgraphicaleffects sources and add note about its state in Qt 6HEADdev

Add a README.md mentioning the documentation on where the ported
effects can be found, as well as how to check out the Qt5 branch.

Pick-to: 6.2
Fixes: QTBUG-95757
Change-Id: Ib47c7e73f8622c8e287df0f74c6f16a5113b357e
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 0 insertions, 2 deletions

diff --git a/sync.profile b/sync.profile
deleted file mode 100644
index 6d035bc..0000000
--- a/sync.profile
+++ /dev/null
@@ -1,2 +0,0 @@
-%modules = ( # path to module name map
-);