Merge branch 'build_fixes' into 'master'

Remove optional package from build scripts

See merge request openlp/openlp!533

setup.py

@@ -113,7 +113,6 @@ using a computer and a display/projector.""",
         'PyQt5 >= 5.12',
         'PyQtWebEngine',
         'Pyro4; platform_system=="Darwin"',
-        'python-vlc',
         'pywin32; platform_system=="Windows"',
         'QtAwesome',
         "qrcode",
@@ -129,6 +128,7 @@ using a computer and a display/projector.""",
         'darkstyle': ['QDarkStyle'],
         'mysql': ['PyMySQL'],
         'odbc': ['pyodbc'],
+        'mp4': ['python-vlc'],
         'postgresql': ['psycopg2'],
         'spellcheck': ['pyenchant >= 1.6'],
         'sword-bibles': ['pysword'],