Remove references to win_sdk

This goal doesn't exist anymore. The build system automatically
translates it to "sdk".

Test: m win_sdk dist && inspect out/dist/apistubs
Change-Id: Ifc4fb07ce32ef21906e8bb8eae0003b1486a525a
diff --git a/services/Android.bp b/services/Android.bp
index e11b044..841edc7 100644
--- a/services/Android.bp
+++ b/services/Android.bp
@@ -221,19 +221,13 @@
     },
     dists: [
         {
-            targets: [
-                "sdk",
-                "win_sdk",
-            ],
+            targets: ["sdk"],
             dir: "apistubs/android/system-server/api",
             dest: "android-non-updatable.txt",
             tag: ".api.txt",
         },
         {
-            targets: [
-                "sdk",
-                "win_sdk",
-            ],
+            targets: ["sdk"],
             dir: "apistubs/android/system-server/api",
             dest: "android-non-updatable-removed.txt",
             tag: ".removed-api.txt",