Revert "Fix cwd for PowerShell: Launch Current File contributed configuration"

This reverts commit 8ebbb55.

The `cwd` has to be faked as the file because of the way this
configuration works with scripts and arguments.

Author: andyleejordan

package.json

@@ -459,7 +459,7 @@
               "type": "PowerShell",
               "request": "launch",
               "script": "^\"\\${file}\"",
-              "cwd": "^\"\\${workspaceFolder}\""
+              "cwd": "^\"\\${file}\""
             }
           },
           {