Reduce the Stackage GHC 8.8 diff again (#419)

Author: ndmitchell

stack88.yaml

@@ -1,10 +1,7 @@
-resolver: nightly-2020-02-03
+resolver: nightly-2020-02-08
 packages:
 - .
 extra-deps:
 - fuzzy-0.1.0.0
-- haskell-lsp-0.20.0.0
-- haskell-lsp-types-0.20.0.0
-- lsp-test-0.10.1.0
 nix:
   packages: [zlib]