Removing unused references

Author: ashgti

lldb/packages/Python/lldbsuite/test/tools/lldb-dap/dap_server.py

@@ -29,15 +29,8 @@
     TextIO,
     Literal,
     cast,
-    TYPE_CHECKING,
 )
 
-if sys.version_info >= (3, 10):
-    from typing import TypeGuard
-else:
-    if TYPE_CHECKING:
-        from typing_extensions import TypeGuard
-
 ## DAP type references
 
 T = TypeVar("T")