Remove legacy proto helper functions

Flag: EXEMPT (removing old flags)
Bug: 330785038
Test: presubmit
Change-Id: I2ced9157bf9aa3541b16cde5495131e82387772a
diff --git a/services/surfaceflinger/Android.bp b/services/surfaceflinger/Android.bp
index a37433c..c2a9880 100644
--- a/services/surfaceflinger/Android.bp
+++ b/services/surfaceflinger/Android.bp
@@ -47,6 +47,7 @@
         "libtimestats_deps",
         "libsurfaceflinger_common_deps",
         "surfaceflinger_defaults",
+        "libsurfaceflinger_proto_deps",
     ],
     cflags: [
         "-DLOG_TAG=\"SurfaceFlinger\"",
@@ -93,7 +94,6 @@
         "libcompositionengine",
         "libframetimeline",
         "libgui_aidl_static",
-        "liblayers_proto",
         "libperfetto_client_experimental",
         "librenderengine",
         "libscheduler",