build: drop duplicate LT_INIT line from configure_ac

Drop duplicate LT_INIT line from configure_ac.

Change-Id: I7e3c55c944d1e65c56740d6f24c8dea14c301952
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/configure.ac b/configure.ac
index 14ed382..a9c7e6d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -52,9 +52,6 @@
 # Checks for typedefs, structures, and compiler characteristics.
 AX_APPEND_COMPILE_FLAGS([-Wall -Werror -Wno-unused-result], [CFLAGS])
 
-# Checks for library functions.
-LT_INIT # Removes 'unrecognized options: --with-libtool-sysroot'
-
 PKG_PROG_PKG_CONFIG
 AC_ARG_WITH([systemdsystemunitdir],
      [AS_HELP_STRING([--with-systemdsystemunitdir=DIR], [Directory for systemd service files])],