remove duplicate import (#116)

Remove duplicate import `from birdnetlib.analyzer import Analyzer`

Author: bbennett80

examples/analyze_and_extract.py

@@ -1,6 +1,5 @@
 from birdnetlib import Recording
 from birdnetlib.analyzer import Analyzer
-from birdnetlib.analyzer import Analyzer
 from datetime import datetime
 from pprint import pprint
 
@@ -72,4 +71,4 @@
   'scientific_name': 'Haemorhous mexicanus',
   'start_time': 9.0}
  ]
- """
+ """