Remove services.connectivity-netstats-sources

The filegroup is unused and can be cleaned up.

Bug: 222234190
Test: m
Change-Id: I7239ed89b2bbf7f1a50bae7257a4911c64d5c84a
diff --git a/service-t/Sources.bp b/service-t/Sources.bp
index 4e669b6..3f7d76a 100644
--- a/service-t/Sources.bp
+++ b/service-t/Sources.bp
@@ -14,27 +14,6 @@
 // limitations under the License.
 //
 
-// NetworkStats related libraries.
-
-filegroup {
-    name: "services.connectivity-netstats-sources",
-    srcs: [
-        "src/com/android/server/net/NetworkIdentity*.java",
-        "src/com/android/server/net/NetworkStats*.java",
-        "src/com/android/server/net/BpfInterfaceMapUpdater.java",
-        "src/com/android/server/net/InterfaceMapValue.java",
-        "src/com/android/server/net/CookieTagMapKey.java",
-        "src/com/android/server/net/CookieTagMapValue.java",
-        "src/com/android/server/net/StatsMapKey.java",
-        "src/com/android/server/net/StatsMapValue.java",
-        "src/com/android/server/net/UidStatsMapKey.java",
-    ],
-    path: "src",
-    visibility: [
-        "//visibility:private",
-    ],
-}
-
 // For test code only.
 filegroup {
     name: "lib_networkStatsFactory_native",