Remove an incorrect assertion in threadPaused:
Remove an incorrect assertion in threadPaused:

The assertion is triggered when we have a loop in the program (in which case we
see the same update frame multiple times in the stack). See #14915 for more
details.

Reviewers: simonmar, bgamari, erikd

Reviewed By: simonmar

Subscribers: rwbarton, carter

GHC Trac Issues: #14915

Differential Revision: https://phabricator.haskell.org/D5133

sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc