Delete unused testdata (#763)

* Delete test/testdata/wrapper/*.

This is all dead code. It was brought over from haskell ide engine, but we don't
use it.

Note:
We are deleting test/testdata/wrapper
We are NOT deleting test/wrapper/testdata

wrapper/testdata contains live testdata, which is being used to test that
haskell-language-server-wrapper can load the appropriate version of
haskell-language-server based on the environment that it is running in.

* Delete HaRe test files.

These are dead code, they are very simple so they aren't likely to be useful
when writing new tests, and they have "HaRe" in the name even though HaRe is
gone, which adds mental burden.

* Delete unused test datafiles.

These all came over from Haskell IDE Engine, and we aren't using them. So lets
clean up by deleting them.

Co-authored-by: Javier Neira <atreyu.bbb@gmail.com>
Co-authored-by: Pepe Iborra <pepeiborra@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Author: 4 people

test/testdata/ApplyRefactError.hs

@@ -25,38 +25,6 @@ executable symbols
   main-is:             Symbols.hs
   default-language:    Haskell2010
 
-
-executable hlintpragma
-  build-depends:       base
-  main-is:             HlintPragma.hs
-  default-language:    Haskell2010
-
-executable harecase
-  build-depends:       base
-  main-is:             HaReCase.hs
-  default-language:    Haskell2010
-
-executable haredemote
-  build-depends:       base
-  main-is:             HaReDemote.hs
-  default-language:    Haskell2010
-
-executable haremovedef
-  build-depends:       base
-  main-is:             HaReMoveDef.hs
-  default-language:    Haskell2010
-
-executable harerename
-  build-depends:       base
-  main-is:             HaReRename.hs
-  default-language:    Haskell2010
-
-executable haregenapplicative
-  build-depends:       base
-                     , parsec
-  main-is:             HaReGA1.hs
-  default-language:    Haskell2010
-
 executable functests
   build-depends:       base
   main-is:             FuncTest.hs
@@ -67,8 +35,3 @@ executable evens
   main-is:             Evens.hs
   hs-source-dirs:      liquid
   default-language:    Haskell2010
-
-executable filewithwarning
-  build-depends:       base
-  main-is:             FileWithWarning.hs
-  default-language:    Haskell2010