Correct sync error in phonemetadata.proto.

java/src/com/google/i18n/phonenumbers/phonemetadata.proto

@@ -20,11 +20,8 @@
 
 syntax = "proto2";
 
-option cc_api_version = 1;
-option java_api_version = 1;
-option py_api_version = 1;
-
 option java_package = "com.google.i18n.phonenumbers";
+option optimize_for = LITE_RUNTIME;
 package i18n.phonenumbers;
 
 message NumberFormat {