Remove explicit dependency on libdl

A dependency to libdl is added by default by the build system based on
system_dynamic_libs property.

Test: m libhardware
Change-Id: I4bc1a7cb4af2c49d6f1343843cf86c436294bed7
diff --git a/Android.bp b/Android.bp
index acaeb25..d11615b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -74,7 +74,6 @@
     shared_libs: [
         "libcutils",
         "liblog",
-        "libdl",
         "libvndksupport",
     ],
     cflags: [