Fix Codacy static analysis issues

- Remove unused imports (re, pytest, Union, Tuple, Link)
- Rename 'id' parameter to 'link_id' to avoid shadowing built-in
- Remove unnecessary pass statement in ParseError class

All 14 Codacy issues resolved while maintaining functionality.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: konard

python/platform_lino/link.py

@@ -2,7 +2,7 @@
 Link class representing a Lino link with optional ID and values.
 """
 
-from typing import List, Optional, Union
+from typing import List, Optional
 
 
 class Link:
@@ -15,15 +15,15 @@ class Link:
     - A link with only values (no id)
     """
 
-    def __init__(self, id: Optional[str] = None, values: Optional[List['Link']] = None):
+    def __init__(self, link_id: Optional[str] = None, values: Optional[List['Link']] = None):
         """
         Initialize a Link.
 
         Args:
-            id: Optional identifier for the link
+            link_id: Optional identifier for the link
             values: Optional list of child links
         """
-        self.id = id
+        self.id = link_id
         self.values = values if values is not None else []
         self._is_from_path_combination = False
 

python/platform_lino/parser.py

@@ -5,14 +5,12 @@
 converting text into structured Link objects.
 """
 
-import re
-from typing import List, Optional, Tuple, Dict, Any
+from typing import List, Optional, Dict, Any
 from .link import Link
 
 
 class ParseError(Exception):
     """Exception raised when parsing fails."""
-    pass
 
 
 class Parser:

python/tests/test_api.py

@@ -1,6 +1,5 @@
 """API tests for Lino parser - ported from JS/Rust implementations."""
 
-import pytest
 from platform_lino import Parser, Link
 
 

python/tests/test_single_line_parser.py

@@ -1,7 +1,6 @@
 """Single-line parser tests - ported from JS implementation."""
 
-import pytest
-from platform_lino import Parser, Link, format_links
+from platform_lino import Parser, format_links
 
 
 parser = Parser()