No longer need to use $shared_toolchain

Change-Id: Id4fae0bdaf57112606e0644611af358fa3a1db3b
diff --git a/BUILD.gn b/BUILD.gn
index ccc6f78..09feabf 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -26,7 +26,6 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-import("//build/toolchain/shared.gni")
 import("//packages/package.gni")
 
 # This is the configuration needed to use libxml2.
@@ -60,18 +59,10 @@
 }
 
 group("libxml2") {
-  public_configs = [ ":libxml2_config" ]
-
-  public_deps = [
-    ":xml2_lib($shared_toolchain)",
-  ]
+  public_deps = [ ":xml2" ]
 }
 
-shared_library("xml2_lib") {
-  visibility = [ ":*" ]
-
-  output_name = "xml2"
-
+shared_library("xml2") {
   sources = [
     "DOCBparser.c",
     "HTMLparser.c",