configure: drop unused variable GBM_BACKEND_DIRS

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>

diff --git a/configure.ac b/configure.ac
index 56095baa7e86ead79a91193fd17923984b5c8fa4..ddc757e16294c1436dd67a4e51e0209cc232c21f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1507,7 +1507,6 @@ if test "x$enable_gbm" = xyes; then
     fi
 
     if test "x$enable_dri" = xyes; then
-        GBM_BACKEND_DIRS="$GBM_BACKEND_DIRS dri"
         if test "x$enable_shared_glapi" = xno; then
             AC_MSG_ERROR([gbm_dri requires --enable-shared-glapi])
         fi