Seperate import of lazy_extractors from that of normal extractors

This prevents "ModuleNotFoundError: No module named 'youtube_dl.extractor.lazy_extractors'" from appearing in the traceback

Related: https://github.com/animelover1984/youtube-dl/issues/17#issuecomment-757945024

youtube_dlc/extractor/__init__.py

@@ -7,9 +7,10 @@ try:
     from .lazy_extractors import _ALL_CLASSES
     _LAZY_LOADER = True
     _PLUGIN_CLASSES = []
-
 except ImportError:
     _LAZY_LOADER = False
+
+if not _LAZY_LOADER:
     from .extractors import *
 
     _PLUGIN_CLASSES = load_plugins('extractor', 'IE', globals())