Misc clean up; Remove the support of jump forward (#4032)

python/sglang/global_config.py

@@ -4,6 +4,13 @@ import os
 
 
 class GlobalConfig:
+    """
+    Store some global constants.
+
+    See also python/sglang/srt/managers/schedule_batch.py::global_server_args_dict, which stores
+    many global runtime arguments as well.
+    """
+
     def __init__(self):
         # Verbosity level
         # 0: do not output anything