Revert "Merge pull request #379 from haskell/secure-exe-path"

This reverts commit 034d2bb, reversing
changes made to b14b373.

Author: jneira

package.json

@@ -132,7 +132,7 @@
           "description": "An optional URL to override where to check for haskell-language-server releases"
         },
         "haskell.serverExecutablePath": {
-          "scope": "machine",
+          "scope": "resource",
           "type": "string",
           "default": "",
           "description": "Manually set a language server executable. Can be something on the $PATH or a path to an executable itself. Works with ~, ${HOME} and ${workspaceFolder}."