[mediasite] Add extractor, subsume sandia and collegerama extractors

youtube_dl/extractor/extractors.py

@@ -205,7 +205,6 @@ from .cnn import (
     CNNArticleIE,
 )
 from .coub import CoubIE
-from .collegerama import CollegeRamaIE
 from .comedycentral import (
     ComedyCentralFullEpisodesIE,
     ComedyCentralIE,
@@ -576,6 +575,7 @@ from .massengeschmacktv import MassengeschmackTVIE
 from .matchtv import MatchTVIE
 from .mdr import MDRIE
 from .mediaset import MediasetIE
+from .mediasite import MediasiteIE
 from .medici import MediciIE
 from .megaphone import MegaphoneIE
 from .meipai import MeipaiIE
@@ -912,7 +912,6 @@ from .rutube import (
 from .rutv import RUTVIE
 from .ruutu import RuutuIE
 from .ruv import RuvIE
-from .sandia import SandiaIE
 from .safari import (
     SafariIE,
     SafariApiIE,