drop redundant bug-reports: field

Author: hvr

text.cabal

@@ -39,7 +39,6 @@ license-file:   LICENSE
 author:         Bryan O'Sullivan <[email protected]>
 maintainer:     Bryan O'Sullivan <[email protected]>
 copyright:      2009-2011 Bryan O'Sullivan, 2008-2009 Tom Harper
-bug-reports:    https://github.com/haskell/text/issues
 category:       Data, Text
 build-type:     Simple
 cabal-version:  >= 1.8