Remove haskell-suite-dummy-program hack

There was some hacky logic in place to give a "haskell-suite" compiler
a dummy location so that we would attempt to configure it.

This logic is no longer necessary since 'configureRequiredProgram' was
changed to accomodate the situation in which 'lookupKnownProgram' fails.
In fact, it is downright harmful, as this dummy location will trigger
errors when we attempt to configure all known programs, which is
a necessary step before attempting to serialise a program database.

Author: sheaf

Cabal/src/Distribution/Simple/Program/Builtin.hs

@@ -226,21 +226,13 @@ hpcProgram =
 -- during the configure phase.
 haskellSuiteProgram :: Program
 haskellSuiteProgram =
-  (simpleProgram "haskell-suite")
-    { -- pretend that the program exists, otherwise it won't be in the
-      -- "configured" state
-      programFindLocation = \_verbosity _searchPath ->
-        return $ Just ("haskell-suite-dummy-location", [])
-    }
+  simpleProgram "haskell-suite"
 
 -- This represent a haskell-suite package manager. See the comments for
 -- haskellSuiteProgram.
 haskellSuitePkgProgram :: Program
 haskellSuitePkgProgram =
-  (simpleProgram "haskell-suite-pkg")
-    { programFindLocation = \_verbosity _searchPath ->
-        return $ Just ("haskell-suite-pkg-dummy-location", [])
-    }
+  simpleProgram "haskell-suite-pkg"
 
 happyProgram :: Program
 happyProgram =