[jit] Remove more reference to TorchScript

Summary: Remove some occurrences in comments.

Test Plan: None

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Author: larryliu0820

exir/dialects/_ops.py

@@ -100,7 +100,7 @@ def __getattr__(self, op_name):
             parent_packet = getattr(self._op_namespace, op_name)
         except AttributeError as e:
             # Turn this into AttributeError so getattr(obj, key, default)
-            # works (this is called by TorchScript with __origin__)
+            # works
             raise AttributeError(
                 f"'_OpNamespace' '{self._dialect}.{self._name}' object has no attribute '{op_name}'"
             ) from e

exir/serde/upgrade.py

@@ -53,7 +53,7 @@ def get_upgraders() -> Dict[str, Tuple[str, str]]:
 
 class GraphModuleOpUpgrader:
     """This upgrader is able to upgrade the old version of ops in a given GraphModule, if all upgraders are available.
-    To use it, retrieve upgraders from somewhere (TorchScript API or new API) and pass it into this upgrader. In
+    To use it, retrieve an upgrader and pass it into this upgrader. In
     __init__() it does the following:
     1. parse the upgrader list and reorder for upgrading purpose.
     2. register old versions of operators as custom ops.
@@ -75,7 +75,7 @@ def div__Scalar_0_3(self: torch.Tensor, other) -> torch.Tensor:     # upgrader i
     },
 
     Note that we require the upgrader function to be runnable in Python (which is a stricter requirement than the
-    original TorchScript upgrader).
+    original, now deprecated TorchScript upgrader).
     """
 
     class UpgraderPass(_ExportPassBaseDeprecatedDoNotUse):