How to completely get rid of replication subscriptions? I have restored a database in another server. I don't want any of the transactional subscriptions of the former database.  I already called

exec sp_removedbreplication 'MyRestoredDB' 
go


And also

exec sp_cleanupdbreplication
go


And

exec sp_replicationdboption 'MyRestoredDB','Publish','False',1
go


But when I try

truncate table dbo.sample


I get the following error: 


  Msg 4711, Level 16, State 1, Line 7 Cannot truncate table 'sample'
  because it is published for replication or enabled for Change Data
  Capture.


I verified that the database isn't enabled for CDC.  What else I can do to perform the truncate?  Delete isn't an option for reasons not relevant to the question.
Take a look at this article: https://www.mssqltips.com/sqlservertip/2710/steps-to-clean-up-orphaned-replication-settings-in-sql-server/

Try dropping the old subscriptions, all publications and then removing replication from the DB, i.e. 

exec sp_dropsubscription --on all subscriptions


then

exec sp_droppublication --on all publications


then

exec sp_replicationdboption


Also, take a look at this question: How to fix a messed up replication on MS SQL Server