Revert "TOOLS: configure options for all-unstable-engines"

This reverts commit bd54615.

configure

@@ -626,26 +626,6 @@ engine_disable_all() {
 	done
 }
 
-# Enable *all unstable* engines
-engine_enable_all_unstable() {
-	for engine in $_engines; do
-		engine_build_default=`get_engine_build_default $engine`
-		if test $engine_build_default = no ; then
-			engine_enable $engine
-		fi
-	done
-}
-
-# Disable *all unstable* engines
-engine_disable_all_unstable() {
-	for engine in $_engines; do
-		engine_build_default=`get_engine_build_default $engine`
-		if test $engine_build_default = no ; then
-			engine_disable ${engine}
-		fi
-	done
-}
-
 # Enable the given engine
 engine_enable() {
 	# Get the parameter
@@ -966,10 +946,6 @@ Game engines:
   --enable-all-engines     enable all engines, including those which are
                            broken or unsupported
   --disable-all-engines    disable all engines
-  --enable-all-unstable-engines
-      enable all engines which are broken or unsupported
-  --disable-all-unstable-engines
-      disable all engines which are broken or unsupported
   --enable-engine=<engine name>[,<engine name>...] enable engine(s) listed
   --disable-engine=<engine name>[,<engine name>...] disable engine(s) listed
   --enable-engine-static=<engine name>[,<engine name>...]
@@ -1374,12 +1350,6 @@ for ac_option in $@; do
 	--disable-all-engines)
 		engine_disable_all
 		;;
-	--enable-all-unstable-engines)
-		engine_enable_all_unstable
-		;;
-	--disable-all-unstable-engines)
-		engine_disable_all_unstable
-		;;
 	--enable-engine=* | --enable-engines=*)
 		for engine_name in `echo $ac_option | cut -d '=' -f 2- | tr ',' '\n'`; do
 			engine_enable "${engine_name}"