Revert "rpc: show the real signup email in an email-signup account's own self view"

This reverts commit 95c08f54bf.

internal/rpc/convert_users.go

@@ -13,24 +13,13 @@ func tgSelfUser(u domain.User) *tg.User {
 	if u.Deleted {
 		return &tg.User{ID: u.ID, Deleted: true}
 	}
-	phone := u.Phone
-	if u.SignupEmail != "" {
-		// Self view only: an email-signup account's users.phone is a random,
-		// meaningless "888" display number (see internal/domain/emailphone.go
-		// and cmd/createuser) -- showing the real signup email in its place is
-		// what the account's own My Account / Edit Profile screen should
-		// display. Never do this in tgUser (how *other* viewers see this
-		// account): the phone field there is already privacy-gated, and this
-		// would leak the email past that gate to anyone allowed to see a phone.
-		phone = u.SignupEmail
-	}
 	out := &tg.User{
 		ID:            u.ID,
 		AccessHash:    u.AccessHash,
 		FirstName:     u.FirstName,
 		LastName:      u.LastName,
 		Username:      u.Username,
-		Phone:         phone,
+		Phone:         u.Phone,
 		Self:          true,
 		Verified:      u.Verified,
 		Scam:          u.Scam,