configure.ac: Remove SPE detection code

We don't have any SPE code, so there's no need to detect it
at configure time.
Signed-off-by: Anton Blanchard <anton@ozlabs.org>

configure.ac

@@ -174,14 +174,6 @@ case "$host" in
 	*) OBJ_FORMAT=elf ;;
 esac
 AC_SUBST(OBJ_FORMAT)
-case "$host" in
-	*-gnuspe)
-		abi_spe=true
-		AC_DEFINE(FLAC__CPU_PPC_SPE)
-		AH_TEMPLATE(FLAC__CPU_PPC_SPE, [define if building for PowerPC with SPE ABI])
-		;;
-esac
-AM_CONDITIONAL(FLaC__CPU_PPC_SPE, test "x$abi_spe" = xtrue)
 
 os_is_windows=no
 case "$host" in