DEV: Remove two more references to instagram_user_infos

Follow-up to ad6f33e5b1

app/services/user_anonymizer.rb

@@ -64,7 +64,6 @@ class UserAnonymizer
       @user.single_sign_on_record.try(:destroy)
       @user.oauth2_user_infos.try(:destroy_all)
       @user.user_associated_accounts.try(:destroy_all)
-      @user.instagram_user_info.try(:destroy)
       @user.user_open_ids.find_each { |x| x.destroy }
       @user.api_keys.find_each { |x| x.try(:destroy) }
       @user.user_emails.secondary.destroy_all

spec/services/user_anonymizer_spec.rb

@@ -210,7 +210,6 @@ describe UserAnonymizer do
       expect(user.user_associated_accounts).to be_empty
       expect(user.single_sign_on_record).to eq(nil)
       expect(user.oauth2_user_infos).to be_empty
-      expect(user.instagram_user_info).to eq(nil)
       expect(user.user_open_ids.count).to eq(0)
     end