Remove comments of privacy.proto to avoid this accidently go to AOSP

package android;

// TODO: It's better to track this by semantic types and set policy for those.

// Do this for now to bootstrap the tools.

enum Destination {

    // Fields or messages annotated with DEST_LOCAL must never be

    // extracted from the device automatically. They can be accessed

    // by tools on the developer's workstation, and if they are sent

    // to another device that must be by the user, with a PII warning. (TBD)

    // by tools on the developer's workstation or test lab devices.

    DEST_LOCAL = 0;

    // Fields or messages annotated with DEST_EXPLICIT can be sent

    DEST_AUTOMATIC = 200;

    // This is the default value, which could be overridden by other values.

    // The reason to pick 255 is it fits into one byte.

    // The reason to pick 255 is it fits into one byte. UNSET fields are treated

    // as EXPLICIT.

    DEST_UNSET = 255;

    // Currently use 0, 100, 200 and 255, values in between are reserved for futures.

message PrivacyFlags {

    optional Destination dest = 1 [ default = DEST_UNSET ];

  // regex to filter pii sensitive info from a string field type

    // regex to filter pii sensitive info from a string field type.

    repeated string patterns = 2;

}

extend google.protobuf.FieldOptions {

    // Flags for automatically filtering statistics

    // Flags used to annotate a field with right privacy level.

    optional PrivacyFlags privacy = 102672883;

}

extend google.protobuf.MessageOptions {

    // Flags used to annotate a message which all its unset primitive types inhert this tag.

    // Flags used to annotate a message which all its unset primitive fields inhert this tag.

    optional PrivacyFlags msg_privacy = 102672883;

}