package/vlc: remove optional dependency to opencv3

OpenCV3 is unmaintained and will be removed from buildroot.

The package does not support OpenCV4:
https://code.videolan.org/videolan/vlc/-/merge_requests/927

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

Config.in.legacy

@@ -146,6 +146,13 @@ endif
 
 comment "Legacy options removed in 2026.02"
 
+config BR2_PACKAGE_VLC_OPENCV3_BACKEND
+	bool "opencv3 support in vlc has been removed"
+	select BR2_LEGACY
+	help
+	  OpenCV3 support in VLC has been reported, as OpenCV has been
+	  removed.
+
 config BR2_PACKAGE_CPPDB
 	bool "cppdb has been removed"
 	select BR2_LEGACY

package/vlc/Config.in

@@ -9,7 +9,6 @@ config BR2_PACKAGE_VLC
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_7
 	select BR2_PACKAGE_LIBVORBIS if BR2_PACKAGE_OPUS
-	select BR2_PACKAGE_VLC_OPENCV3_BACKEND if BR2_PACKAGE_OPENCV3
 	select BR2_PACKAGE_ZLIB if BR2_PACKAGE_TAGLIB
 	help
 	  VLC is a free and open source cross-platform multimedia player
@@ -18,11 +17,6 @@ config BR2_PACKAGE_VLC
 
 	  http://www.videolan.org/vlc/
 
-config BR2_PACKAGE_VLC_OPENCV3_BACKEND
-	bool
-	select BR2_PACKAGE_OPENCV3_LIB_IMGPROC
-	select BR2_PACKAGE_OPENCV3_LIB_OBJDETECT
-
 comment "vlc needs a toolchain w/ C++, dynamic library, wchar, threads, gcc >= 4.9, headers >= 3.7"
 	depends on !BR2_RISCV_32
 	depends on BR2_USE_MMU

package/vlc/vlc.mk

@@ -72,6 +72,7 @@ VLC_CONF_OPTS += \
 	--disable-mtp \
 	--disable-mpc \
 	--disable-notify \
+	--disable-opencv \
 	--disable-projectm \
 	--disable-schroedinger \
 	--disable-shine \
@@ -211,13 +212,6 @@ else
 VLC_CONF_OPTS += --disable-gles2
 endif
 
-ifeq ($(BR2_PACKAGE_OPENCV3),y)
-VLC_CONF_OPTS += --enable-opencv
-VLC_DEPENDENCIES += opencv3
-else
-VLC_CONF_OPTS += --disable-opencv
-endif
-
 ifeq ($(BR2_PACKAGE_OPUS),y)
 VLC_CONF_OPTS += --enable-opus
 VLC_DEPENDENCIES += libvorbis opus