Reverted part of yesterday's changes (libmu_cpp).

@@ -27,7 +27,6 @@ AC_PREREQ(2.59)
 
 dnl Check for programs
 AC_PROG_CC
-AC_PROG_CXX
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_LIBTOOL_DLOPEN
@@ -684,18 +683,6 @@ if test x"$useguile" = x"yes"; then
          ],[useguile=no])
 fi
 
-dnl Check whether to enable C++ support
-if test -z "$CXX"; then
-	:
-else
-	AC_SUBST(MU_CXX_LIBS)
-	AC_SUBST(MU_CXX_PROGS)
-	AC_SUBST(MU_CXX_INCLUDES)
-	MU_CXX_LIBS='$(MU_CXX_LIBS)'
-	MU_CXX_PROGS='$(MU_CXX_PROGS)'
-	MU_CXX_INCLUDES='$(MU_CXX_INCLUDES)'
-fi
-
 dnl Check for Emacs site-lisp directory
 AM_PATH_LISPDIR
 
@@ -769,11 +756,6 @@ AC_CONFIG_FILES([Makefile
  include/mailutils/sys/Makefile
  intl/Makefile
  lib/Makefile
- libmu_cpp/Makefile
- libmu_cpp/examples/Makefile
- libmu_cpp/include/Makefile
- libmu_cpp/include/mailutils/Makefile
- libmu_cpp/include/mailutils/c++/Makefile
  libmu_scm/Makefile
  libsieve/Makefile
  libsieve/extensions/Makefile