Don't hide diagnostics from outside "workspace"

Fixes sublimelsp#221
If language servers end up sending undesirable diagnostics, we should look at the server first

Author: tomv564

plugin/core/diagnostics.py

@@ -3,7 +3,6 @@
 from .logging import debug
 from .url import uri_to_filename
 from .protocol import Diagnostic
-from .workspace import is_in_workspace
 from .events import Events
 
 assert Diagnostic
@@ -45,11 +44,6 @@ def handle_diagnostics(update: 'Any'):
     file_path = uri_to_filename(update.get('uri'))
     window = sublime.active_window()
 
-    if not is_in_workspace(window, file_path):
-        debug("Skipping diagnostics for file", file_path,
-              " it is not in the workspace")
-        return
-
     diagnostics = list(
         Diagnostic.from_lsp(item) for item in update.get('diagnostics', []))