Remove legacy proto helper functions

Flag: EXEMPT (removing old flags)
Bug: 330785038
Test: presubmit
Change-Id: I2ced9157bf9aa3541b16cde5495131e82387772a
diff --git a/services/surfaceflinger/CompositionEngine/Android.bp b/services/surfaceflinger/CompositionEngine/Android.bp
index 7fa58df..b826466 100644
--- a/services/surfaceflinger/CompositionEngine/Android.bp
+++ b/services/surfaceflinger/CompositionEngine/Android.bp
@@ -17,6 +17,7 @@
         "librenderengine_deps",
         "libtimestats_deps",
         "surfaceflinger_defaults",
+        "libsurfaceflinger_proto_deps",
     ],
     cflags: [
         "-DLOG_TAG=\"CompositionEngine\"",
@@ -41,7 +42,6 @@
         "libutils",
     ],
     static_libs: [
-        "liblayers_proto",
         "libmath",
         "librenderengine",
         "libtimestats",