MAINTAINERS: Drop Nicolas from maintaining pcie-brcmstb

Nicolas indicated a long time back that he would not have the bandwidth
and indeed, has not provided any review or feedback since.

Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20250624231923.990361-2-florian.fainelli@broadcom.com

Author: ffainelli

MAINTAINERS

@@ -5085,7 +5085,6 @@ F:	include/linux/platform_data/brcmnand.h
 
 BROADCOM STB PCIE DRIVER
 M:	Jim Quinlan <jim2101024@gmail.com>
-M:	Nicolas Saenz Julienne <nsaenz@kernel.org>
 M:	Florian Fainelli <florian.fainelli@broadcom.com>
 R:	Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
 L:	linux-pci@vger.kernel.org