Fix ruff linting issues

- Remove debug print statements
- Remove trailing whitespace on blank lines
- Remove unused pytest import

Amp-Thread-ID: https://ampcode.com/threads/T-019c3a8d-3b4f-75b4-8513-1c77914782f7
Co-authored-by: Amp <amp@ampcode.com>

app/assets/scanner.py

@@ -322,7 +322,7 @@ def build_asset_specs(
 
         mime_type = metadata.content_type if metadata else None
         if mime_type is None:
-            print(f"[build_asset_specs] no mime_type for {abs_p} (metadata={metadata is not None})")
+            pass
         specs.append(
             {
                 "abs_path": abs_p,

app/assets/seeder.py

@@ -6,7 +6,7 @@ import threading
 import time
 from dataclasses import dataclass, field
 from enum import Enum
-from typing import TYPE_CHECKING, Callable
+from typing import Callable
 
 from app.assets.scanner import (
     RootType,
@@ -20,9 +20,6 @@ from app.assets.scanner import (
 )
 from app.database.db import dependencies_available
 
-if TYPE_CHECKING:
-    pass
-
 
 class State(Enum):
     """Seeder state machine states."""

app/assets/services/metadata_extract.py

@@ -22,7 +22,7 @@ MAX_SAFETENSORS_HEADER_SIZE = 8 * 1024 * 1024
 
 def _register_custom_mime_types():
     """Register custom MIME types for model and config files.
-    
+
     Called before each use because mimetypes.init() in server.py resets the database.
     Uses a quick check to avoid redundant registrations.
     """
@@ -30,7 +30,7 @@ def _register_custom_mime_types():
     test_result, _ = mimetypes.guess_type("test.safetensors")
     if test_result == "application/safetensors":
         return
-    
+
     mimetypes.add_type("application/safetensors", ".safetensors")
     mimetypes.add_type("application/safetensors", ".sft")
     mimetypes.add_type("application/pytorch", ".pt")
@@ -314,7 +314,7 @@ def extract_file_metadata(
     mime_type, _ = mimetypes.guess_type(abs_path)
     meta.content_type = mime_type
     if mime_type is None:
-        print(f"[extract_file_metadata] No mime_type for {abs_path}")
+        pass
 
     # Size from stat
     if stat_result is None:

tests-unit/assets_test/services/test_bulk_ingest.py

@@ -2,7 +2,6 @@
 
 from pathlib import Path
 
-import pytest
 from sqlalchemy.orm import Session
 
 from app.assets.database.models import Asset