No longer need to use fuchsia_shared_library

Change-Id: Id6889790e08afcc1bbaf12d11dd35cc7346debf6
diff --git a/BUILD.gn b/BUILD.gn
index 1e977f5..af7292d 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")
 
 package("curl") {
@@ -72,7 +71,7 @@
   ]
 }
 
-fuchsia_shared_library("libcurl") {
+shared_library("libcurl") {
   output_name = "curl"
 
   sources = [