QtQuickControls: Enable tests for win32-msvc2010_developer-build_angle_Windows_7

3D support is already enabled and tests are passing for 'dev' and 'release' already,
so there is no point to keep these tests disabled.

Marking it as insignificant for now just in case.

This change reverts 02b07972524f98b95e27c7eaf2ada53765bc5fbb

Change-Id: Iad9c55da9a2260853d54dbed1485da5117116571
Reviewed-by: Simo Fält <simo.falt@digia.com>