Revert "Add package config for zlib"

Breakage w/ shlib toolchain

This reverts commit 3a83e7c2e2d27d6344cad252348593d4886923a8.

Change-Id: I491b4230603d2f40a0a10f1e00e67c1470e3f40e
diff --git a/BUILD.gn b/BUILD.gn
index 5480898..b5a7c51 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -26,8 +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("//packages/package.gni")
-
 config("zlib_config") {
   include_dirs = [ "." ]
 }
@@ -35,7 +33,9 @@
 config("zlib_warnings") {
   visibility = [ ":*" ]
 
-  cflags = [ "-Wno-implicit-function-declaration" ]
+  cflags = [
+    "-Wno-implicit-function-declaration",
+  ]
 }
 
 shared_library("zlib") {
@@ -77,7 +77,9 @@
 config("minizip_warnings") {
   visibility = [ ":*" ]
 
-  cflags = [ "-Wno-implicit-function-declaration" ]
+  cflags = [
+    "-Wno-implicit-function-declaration",
+  ]
 
   if (is_clang) {
     # minizip uses `if ((a == b))` for some reason.
@@ -96,28 +98,8 @@
     "contrib/minizip/zip.h",
   ]
 
-  deps = [
-    ":zlib",
-  ]
+  deps = [ ":zlib" ]
   configs += [ ":minizip_warnings" ]
   configs -= [ "//build/config:symbol_visibility_hidden" ]
   public_configs = [ ":zlib_config" ]
 }
-
-package("package") {
-  package_name = "zlib"
-  deps = [
-    ":minizip",
-    ":zlib",
-  ]
-
-  libraries = [
-    {
-      name = "libz.so"
-    },
-
-    {
-      name = "libminizip.so"
-    },
-  ]
-}