Get rid of unneeded dependencies for "elm" exe

elm-compiler.cabal

@@ -151,25 +151,9 @@ Executable elm
         Elm.Compiler.Version
 
     Build-depends:
-        aeson >= 0.7 && < 0.9,
-        aeson-pretty >= 0.7 && < 0.8,
-        ansi-terminal >= 0.6.2.1 && < 0.7,
         base >=4.2 && <5,
-        binary >= 0.7.0.0 && < 0.8,
-        bytestring >= 0.9 && < 0.11,
-        cmdargs >= 0.7 && < 0.11,
-        containers >= 0.3 && < 0.6,
         directory >= 1.0 && < 2.0,
-        filepath >= 1 && < 2.0,
-        indents >= 0.3 && < 0.4,
-        language-glsl >= 0.0.2 && < 0.3,
-        mtl >= 2.2 && < 3,
-        parsec >= 3.1.1 && < 3.5,
-        pretty >= 1.0 && < 2.0,
-        process,
-        text >= 1 && < 2,
-        transformers >= 0.2 && < 0.5,
-        union-find >= 0.2 && < 0.3
+        process
 
 
 Test-Suite compiler-tests