[CEC Configuration] Remove cec-config XSD and the main cec_config.xml

Bug: 180316277
Bug: 166430550
Test: build; flash; run
Change-Id: I898324ee8c8339c95f72b7839bc68296830606e1
diff --git a/Android.bp b/Android.bp
index c5980b9..2215609 100644
--- a/Android.bp
+++ b/Android.bp
@@ -665,9 +665,8 @@
     ],
     required: [
         "framework-platform-compat-config",
-        // TODO: remove gps_debug, cec_config.xml and protolog.conf.json when the build system propagates "required" properly.
+        // TODO: remove gps_debug and protolog.conf.json when the build system propagates "required" properly.
         "gps_debug.conf",
-        "cec_config.xml",
         "icu4j-platform-compat-config",
         "libcore-platform-compat-config",
         "protolog.conf.json.gz",