configure: Drop target-board for arm/ppc

configure

@@ -83,9 +83,6 @@ options:
                               first occurrence specifies the primary
                               architecture of the Haiku to build, subsequent
                               ones the secondary architectures.
-  --target-board <board>      ARM only: Target board to build for.
-                              <board> is one of: "beagleboard","beaglebone",
-                              "rpi2","cubieboard4","verdex","overo"
   --update                    re-runs last configure invocation [must be given
                               as first option!]
   --use-clang                 Build with host Clang instead of GCC cross
@@ -473,14 +470,6 @@ supportedTargetArchs="
 	x86_64
 	x86_gcc2
 	"
-supportedTargetBoards="
-	beagleboard
-	beaglebone
-	rpi2
-	cubieboard4
-	verdex
-	overo
-	"
 
 # determine output directory
 if [ "$currentDir" = "$sourceDir" ]; then
@@ -608,15 +597,6 @@ while [ $# -gt 0 ] ; do
 			)
 			haikuTargetArchs="$haikuTargetArchs $targetArch"
 			;;
-		--target-board)
-			assertparam "$1" $#
-			HAIKU_BOOT_BOARD=$2
-			is_in_list "$HAIKU_BOOT_BOARD" "$supportedTargetBoards" || (
-				echo "Unsupported target board: \"$HAIKU_BOOT_BOARD\"" >&2
-				exit 1
-			)
-			shift 2
-			;;
 		--use-clang) useClang=1; shift 1;;
 		--use-gcc-pipe)	HAIKU_USE_GCC_PIPE=1; shift 1;;
 		--use-gcc-graphite)	useGccGraphiteDefault=1; shift 1;;