MAINTAINERS: drm: vc4: Drop Emma's tree

Emma stepped back from VC4 maintenance a while ago, and
all patches are now merged through drm-misc.

Drop Emma's tree from MAINTAINERS.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240621131926.3133484-2-dave.stevenson@raspberrypi.com

MAINTAINERS

@@ -7523,7 +7523,6 @@ M:	Maxime Ripard <mripard@kernel.org>
 M:	Dave Stevenson <dave.stevenson@raspberrypi.com>
 R:	Raspberry Pi Kernel Maintenance <kernel-list@raspberrypi.com>
 S:	Supported
-T:	git git://github.com/anholt/linux
 T:	git https://gitlab.freedesktop.org/drm/misc/kernel.git
 F:	Documentation/devicetree/bindings/display/brcm,bcm2835-*.yaml
 F:	drivers/gpu/drm/vc4/