configure: Don't check for sdbusplus twice

The second check is entirely unnecessary.

Change-Id: I465577c50c0b9476a368373dae1b066b3a758a9e
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/configure.ac b/configure.ac
index bd8c454..b48942b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -30,9 +30,6 @@
     AC_MSG_ERROR(["Requires sdbusplus package."]))
 
 AS_IF([test "x$enable_softoff" != "xno"],
-    # Check for sdbusplus
-    PKG_CHECK_MODULES([SDBUSPLUS], [sdbusplus],, [AC_MSG_ERROR(["sdbusplus packaged required and not found"])])
-
     # Check for sdbus++ tool
     [AC_PATH_PROG([SDBUSPLUSPLUS], [sdbus++])]
     AS_IF([test "x$SDBUSPLUSPLUS" == "x"],