[GHC] #10935: More unused and non-deprecated warning flags

[GHC]

#10935: More unused and non-deprecated warning flags
-------------------------------------+-------------------------------------
           Reporter:  osa1           |             Owner:
               Type:  task           |            Status:  new
           Priority:  lowest         |         Milestone:
          Component:  Compiler       |           Version:  7.10.2
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:  #10752
Differential Rev(s):                 |
-------------------------------------+-------------------------------------
 For #10752 I was looking at some warning generation code, and I realized
 that these flags are not doing anything right now, but they're not
 deprecated:

 - -fwarn-tabs
 - -fwarn-monomorphism-restriction
 - -fwarn-unrecognised-pragmas

 This one is not even shown in user manual or man page:

 - Opt_WarnAlternativeLayoutRileTransitional

 We should probably deprecate and remove them.

 Another thing is that we should probably remove -fwarn-amp in HEAD.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10935>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler