stdlib: Remove PyStats Accumulator

This appears to have no equivalent type in the CPP stats and was never
utilized in PyStats.

Change-Id: Ia9afc83b4159eb1ab2c6f44ec0ad86cd73f2a4f8

src/python/m5/ext/pystats/jsonloader.py

@@ -37,7 +37,6 @@ from .group import (
 )
 from .simstat import SimStat
 from .statistic import (
-    Accumulator,
     Distribution,
     Scalar,
     Statistic,
@@ -74,10 +73,6 @@ class JsonLoader(json.JSONDecoder):
                 d.pop("type", None)
                 return Distribution(**d)
 
-            elif d["type"] == "Accumulator":
-                d.pop("type", None)
-                return Accumulator(**d)
-
             elif d["type"] == "Group":
                 return Group(**d)
 

src/python/m5/ext/pystats/statistic.py

@@ -195,37 +195,3 @@ class Distribution(Vector):
         # These check some basic conditions of a distribution.
         assert self.bin_size >= 0
         assert self.num_bins >= 1
-
-
-class Accumulator(Vector):
-    """
-    A statistical type representing an accumulator.
-    """
-
-    _count: int
-    min: Union[int, float]
-    max: Union[int, float]
-    sum_squared: Optional[int]
-
-    def __init__(
-        self,
-        value: Iterable[Union[int, float]],
-        count: int,
-        min: Union[int, float],
-        max: Union[int, float],
-        sum_squared: Optional[int] = None,
-        description: Optional[str] = None,
-    ):
-        super().__init__(
-            value=value,
-            type="Accumulator",
-            description=description,
-        )
-
-        self._count = count
-        self.min = min
-        self.max = max
-        self.sum_squared = sum_squared
-
-    def count(self) -> int:
-        return self._count