hide call button for note to self

Session/Conversations/ConversationVC.swift

@@ -309,7 +309,7 @@ final class ConversationVC : BaseVC, ConversationViewModelDelegate, OWSConversat
                 settingsButton.accessibilityLabel = "Settings button"
                 settingsButton.isAccessibilityElement = true
                 rightBarButtonItems.append(settingsButton)
-                if SSKPreferences.areCallsEnabled || !UserDefaults.standard[.hasSeenCallIPExposureWarning] {
+                if !thread.isNoteToSelf() && (SSKPreferences.areCallsEnabled || !UserDefaults.standard[.hasSeenCallIPExposureWarning]) {
                     let callButton = UIBarButtonItem(image: UIImage(named: "Phone")!, style: .plain, target: self, action: #selector(startCall))
                     rightBarButtonItems.append(callButton)
                 }