(Internal) Remove use of before parameter in streams

praw/models/util.py

@@ -161,37 +161,20 @@ def stream_generator(
            print(comment)
 
     """
-    before_attribute = None
     exponential_counter = ExponentialCounter(max_counter=16)
     seen_attributes = BoundedSet(301)
-    without_before_counter = 0
     responses_without_new = 0
     valid_pause_after = pause_after is not None
     while True:
         found = False
-        newest_attribute = None
-        limit = 100
-        if before_attribute is None:
-            limit -= without_before_counter
-            without_before_counter = (without_before_counter + 1) % 30
-        for item in reversed(
-            list(
-                function(
-                    limit=limit,
-                    params={"before": before_attribute},
-                    **function_kwargs
-                )
-            )
-        ):
+        for item in reversed(list(function(limit=100, **function_kwargs))):
             attribute = getattr(item, attribute_name)
             if attribute in seen_attributes:
                 continue
             found = True
             seen_attributes.add(attribute)
-            newest_attribute = attribute
             if not skip_existing:
                 yield item
-        before_attribute = newest_attribute
         skip_existing = False
         if valid_pause_after and pause_after < 0:
             yield None