Bug 1295811 - Remove check for __attribute__(aligned()); r=glandium

It was setting ATTRIBUTE_ALIGNED_MAX which hasn't been used for 6 years
since 590a7be0e60f (bug 556455) removed its only consumer.

MozReview-Commit-ID: HSAql5cUrQH

--HG--
extra : rebase_source : 34193d16b6073c5ad13eb4787b876fc3a9266c2b

old-configure.in

@@ -3163,27 +3163,6 @@ fi
 
 AC_SUBST(MOZ_RAW)
 
-dnl Checks for __attribute__(aligned()) directive need by libogg
-AC_CACHE_CHECK([__attribute__ ((aligned ())) support],
-    [ac_cv_c_attribute_aligned],
-    [ac_cv_c_attribute_aligned=0
-     CFLAGS_save="${CFLAGS}"
-     CFLAGS="${CFLAGS} -Werror"
-     for ac_cv_c_attr_align_try in 64 32 16 8; do
-       echo "trying $ac_cv_c_attr_align_try"
-       AC_TRY_COMPILE([],
-                      [static char c __attribute__ ((aligned(${ac_cv_c_attr_align_try}))) = 0; return c;],
-                      [ac_cv_c_attribute_aligned="${ac_cv_c_attr_align_try}"])
-       if test "$ac_cv_c_attribute_aligned" != 0; then
-         break;
-       fi
-     done
-       CFLAGS="${CFLAGS_save}"])
-if test "${ac_cv_c_attribute_aligned}" != "0"; then
-  AC_DEFINE_UNQUOTED([ATTRIBUTE_ALIGNED_MAX],
-                     [${ac_cv_c_attribute_aligned}],[Maximum supported data alignment])
-fi
-
 dnl ========================================================
 dnl = Apple platform decoder support
 dnl ========================================================