Fix WRAPPER_DIR contention between libxml2 and guththila

When configuring with --disable-libxml2 AND --enable-guththila, the WRAPPER_DIR
variable gets cleared by --disable-libxml2 even after --enable-guththila has
set it.

JIRA: AXIS2C-1684


diff --git a/configure.ac b/configure.ac
index fe037eb..3662862 100644
--- a/configure.ac
+++ b/configure.ac
@@ -197,7 +197,6 @@
 [ case "${enableval}" in
   no)
     AC_MSG_RESULT(no)
-    WRAPPER_DIR=""
     ;;
   *)
     AC_MSG_RESULT(yes)
diff --git a/neethi/configure.ac b/neethi/configure.ac
index 3d815ab..745d5d2 100644
--- a/neethi/configure.ac
+++ b/neethi/configure.ac
@@ -95,7 +95,6 @@
 [ case "${enableval}" in
   no)
     AC_MSG_RESULT(no)
-    WRAPPER_DIR=""
     ;;
   *)
     AC_MSG_RESULT(yes)