Remove unused build-depends in hls-cabal-plugin lib and test

Author: jian-lin

haskell-language-server.cabal

@@ -283,7 +283,6 @@ library hls-cabal-plugin
     , unordered-containers  >=0.2.10.0
     , containers
     , cabal-add
-    , process
     , aeson
     , Cabal
     , pretty
@@ -315,7 +314,6 @@ test-suite hls-cabal-plugin-tests
     , lens
     , lsp-types
     , text
-    , hls-plugin-api
 
 -----------------------------
 -- class plugin