avcodec/vaapi: remove legacy checks (fixes #26489)

This stuff is removed in AVCODEC ABI 59, and it is no longer used as of
VLC 4.0.

configure.ac

@@ -2539,25 +2539,6 @@ AM_CONDITIONAL([HAVE_VAAPI_DRM], [test "${have_vaapi_drm}" = "yes"])
 AM_CONDITIONAL([HAVE_VAAPI_X11], [test "${have_vaapi_x11}" = "yes"])
 AM_CONDITIONAL([HAVE_VAAPI_WL], [test "${have_vaapi_wl}" = "yes"])
 
-have_avcodec_vaapi="no"
-AS_IF([test "${have_vaapi}" = "yes" -a "${have_avcodec}" = "yes"], [
-  VLC_SAVE_FLAGS
-  CPPFLAGS="${CPPFLAGS} ${AVCODEC_CFLAGS}"
-  CFLAGS="${CFLAGS} ${AVCODEC_CFLAGS}"
-  AC_CHECK_HEADERS([libavcodec/vaapi.h], [
-    AC_MSG_NOTICE([VA API acceleration activated])
-    have_avcodec_vaapi="yes"
-  ],[
-    AS_IF([test -n "${enable_libva}"], [
-      AC_MSG_ERROR([libva is present but libavcodec/vaapi.h is missing])
-    ], [
-      AC_MSG_WARN([libva is present but libavcodec/vaapi.h is missing ])
-    ])
-  ])
-  VLC_RESTORE_FLAGS
-])
-AM_CONDITIONAL([HAVE_AVCODEC_VAAPI], [test "${have_avcodec_vaapi}" = "yes"])
-
 dnl
 dnl dxva2 needs avcodec
 dnl

modules/codec/Makefile.am

@@ -395,9 +395,11 @@ libvaapi_plugin_la_SOURCES = \
 libvaapi_plugin_la_CPPFLAGS = $(AM_CPPFLAGS)
 libvaapi_plugin_la_CFLAGS = $(AM_CFLAGS) $(AVCODEC_CFLAGS)
 libvaapi_plugin_la_LIBADD = $(LIBVA_LIBS) $(AVCODEC_LIBS)
-if HAVE_AVCODEC_VAAPI
+if HAVE_AVCODEC
+if HAVE_VAAPI
 codec_LTLIBRARIES += libvaapi_plugin.la
 endif
+endif
 
 libd3d9_common_la_SOURCES = video_chroma/d3d9_fmt.c video_chroma/d3d9_fmt.h \
 	video_chroma/dxgi_fmt.c video_chroma/dxgi_fmt.h

modules/codec/avcodec/vaapi.c

@@ -42,7 +42,6 @@
 # include <va/va_drm.h>
 #endif
 #include <libavcodec/avcodec.h>
-#include <libavcodec/vaapi.h>
 #include <libavutil/hwcontext_vaapi.h>
 
 #include "avcodec.h"