Fix symbols for non-existing (unsaved) files

Fix `textDocument/documentSymbols` returning an empty result for
non-existing (unsaved) files: Do not use `os.path.samefile()` which
accesses the file system to check if two file paths point to the same
file. Just compare the file paths. (This basically reverts commit
40afab3.)

This fixes issue python-lsp#301 [1].

[1] python-lsp#301

Author: rear1019

pylsp/plugins/symbols.py

@@ -2,7 +2,7 @@
 # Copyright 2021- Python Language Server Contributors.
 
 import logging
-import os
+from pathlib import Path
 
 from pylsp import hookimpl
 from pylsp.lsp import SymbolKind
@@ -91,14 +91,7 @@ def pylsp_document_symbols(config, document):
                 else:
                     continue
 
-        try:
-            docismodule = os.path.samefile(document.path, d.module_path)
-        except (TypeError, FileNotFoundError):
-            # Python 2 on Windows has no .samefile, but then these are
-            # strings for sure
-            docismodule = document.path == d.module_path
-
-        if _include_def(d) and docismodule:
+        if _include_def(d) and Path(document.path) == d.module_path:
             tuple_range = _tuple_range(d)
             if tuple_range in exclude:
                 continue