remove Contact in proto (unused)

protos/SignalService.proto

@@ -82,77 +82,6 @@ message DataMessage {
     repeated QuotedAttachment attachments = 4;
   }
 
-  message Contact {
-
-    message Name {
-      optional string givenName   = 1;
-      optional string familyName  = 2;
-      optional string prefix      = 3;
-      optional string suffix      = 4;
-      optional string middleName  = 5;
-      optional string displayName = 6;
-    }
-
-    message Phone {
-
-      enum Type {
-        HOME   = 1;
-        MOBILE = 2;
-        WORK   = 3;
-        CUSTOM = 4;
-      }
-
-      optional string value = 1;
-      optional Type   type  = 2;
-      optional string label = 3;
-    }
-
-    message Email {
-
-      enum Type {
-        HOME   = 1;
-        MOBILE = 2;
-        WORK   = 3;
-        CUSTOM = 4;
-      }
-
-      optional string value = 1;
-      optional Type   type  = 2;
-      optional string label = 3;
-    }
-
-    message PostalAddress {
-
-      enum Type {
-        HOME   = 1;
-        WORK   = 2;
-        CUSTOM = 3;
-      }
-
-      optional Type   type         = 1;
-      optional string label        = 2;
-      optional string street       = 3;
-      optional string pobox        = 4;
-      optional string neighborhood = 5;
-      optional string city         = 6;
-      optional string region       = 7;
-      optional string postcode     = 8;
-      optional string country      = 9;
-    }
-
-    message Avatar {
-      optional AttachmentPointer avatar    = 1;
-      optional bool              isProfile = 2;
-    }
-
-    optional Name              name            = 1;
-    repeated Phone             number          = 3;
-    repeated Email             email           = 4;
-    repeated PostalAddress     address         = 5;
-    optional Avatar            avatar          = 6;
-    optional string            organization    = 7;
-  }
-
   message Preview {
     // @required
     optional string            url   = 1;