configure: Remove some dead code.

configure

diff --git a/configure b/configure
index 82d8cb8..82d969b 100755
--- a/configure
+++ b/configure
@@ -6544,12 +6544,6 @@
     then
                 COREAUDIO="-framework CoreAudio -framework AudioUnit -framework CoreServices -framework AudioToolbox -framework CoreMIDI"
 
-        ac_save_LIBS="$LIBS"
-        if test "$ac_cv_header_AudioToolbox_AudioConverter_h" = "yes"
-        then
-            LIBS="$LIBS $COREAUDIO"
-            LIBS="$ac_save_LIBS"
-        fi
     fi
     if test "$ac_cv_header_OpenAL_al_h" = "yes"
     then

configure.ac

diff --git a/configure.ac b/configure.ac
index a338d8c..21c0203 100644
--- a/configure.ac
+++ b/configure.ac
@@ -704,12 +704,6 @@
     then
         dnl CoreServices needed by AudioUnit
         AC_SUBST(COREAUDIO,"-framework CoreAudio -framework AudioUnit -framework CoreServices -framework AudioToolbox -framework CoreMIDI")
-        ac_save_LIBS="$LIBS"
-        if test "$ac_cv_header_AudioToolbox_AudioConverter_h" = "yes"
-        then
-            LIBS="$LIBS $COREAUDIO"
-            LIBS="$ac_save_LIBS"
-        fi
     fi
     if test "$ac_cv_header_OpenAL_al_h" = "yes"
     then