configure: Drop feature checks for libusbmuxd and libplist as version…

… requirements already imply them

configure.ac

@@ -81,34 +81,6 @@ case ${host_os} in
 esac
 AM_CONDITIONAL(WIN32, test x$win32 = xtrue)
 
-AC_SUBST(libusbmuxd_CFLAGS)
-AC_SUBST(libusbmuxd_LIBS)
-AC_SUBST(libplist_CFLAGS)
-AC_SUBST(libplist_LIBS)
-
-CACHED_CFLAGS="$CFLAGS"
-CFLAGS+=" $libusbmuxd_CFLAGS $libplist_CFLAGS"
-CACHED_LDFLAGS="$LDFLAGS"
-LDFLAGS+=" $libusbmuxd_LIBS $libplist_LIBS"
-
-AC_CHECK_MEMBER(usbmuxd_device_info_t.conn_type,, AC_MSG_ERROR([libusbmuxd (usbmuxd.h) is not up-to-date; missing conn_type member in usbmuxd_device_info_t. Please update libusbmuxd to build $PACKAGE_NAME]), [#include <usbmuxd.h>])
-AC_TRY_COMPILE([
-  #include <usbmuxd.h>
-], [
-  enum usbmux_connection_type conntypeusb = CONNECTION_TYPE_USB;
-  enum usbmux_connection_type conntypenet = CONNECTION_TYPE_NETWORK;
-],, AC_MSG_ERROR([[libusbmuxd (usbmuxd.h) is not up-to-date; missing enum usbmux_connection_type with CONNECTION_TYPE_USB and CONNECTION_TYPE_NETWORK - Please update libusbmuxd to build $PACKAGE_NAME]]))
-AC_TRY_COMPILE([
-  #include <usbmuxd.h>
-], [
-  enum usbmux_lookup_options opts = DEVICE_LOOKUP_USBMUX | DEVICE_LOOKUP_NETWORK | DEVICE_LOOKUP_PREFER_NETWORK;
-],, AC_MSG_ERROR([[libusbmuxd (usbmuxd.h) is not up-to-date; missing enum usbmux_lookup_options with DEVICE_LOOKUP_USBMUX, DEVICE_LOOKUP_NETWORK, and DEVICE_LOOKUP_PREFER_NETWORK - Please update libusbmuxd to build $PACKAGE_NAME]]))
-
-AC_CHECK_LIB([plist-2.0], [plist_string_val_compare],, [AC_MSG_ERROR([[libplist is not up-to-date; missing plist_string_val_compare() etc. functions - Please update libplist to build $PACKAGE_NAME]])])
-
-CFLAGS="$CACHED_CFLAGS"
-LDFLAGS="$CACHED_LDFLAGS"
-
 AC_CHECK_MEMBER(struct dirent.d_type, AC_DEFINE(HAVE_DIRENT_D_TYPE, 1, [define if struct dirent has member d_type]),, [#include <dirent.h>])
 
 # Cython Python Bindings