diff --git a/.changes/unreleased/Under the Hood-20241015-110006.yaml b/.changes/unreleased/Under the Hood-20241015-110006.yaml
new file mode 100644
index 00000000..ab7899e3
--- /dev/null
+++ b/.changes/unreleased/Under the Hood-20241015-110006.yaml	
@@ -0,0 +1,6 @@
+kind: Under the Hood
+body: Remove cumulative metric type param deprecation warning
+time: 2024-10-15T11:00:06.108655-05:00
+custom:
+    Author: DevonFulcher
+    Issue: None
diff --git a/dbt_semantic_interfaces/validations/metrics.py b/dbt_semantic_interfaces/validations/metrics.py
index 41649c2d..f0eb0dff 100644
--- a/dbt_semantic_interfaces/validations/metrics.py
+++ b/dbt_semantic_interfaces/validations/metrics.py
@@ -1,5 +1,5 @@
 import traceback
-from typing import Dict, Generic, List, Optional, Sequence, Set, Tuple
+from typing import Dict, Generic, List, Optional, Sequence, Tuple
 
 from dbt_semantic_interfaces.call_parameter_sets import FilterCallParameterSets
 from dbt_semantic_interfaces.errors import ParsingException
@@ -48,7 +48,6 @@ class CumulativeMetricRule(SemanticManifestValidationRule[SemanticManifestT], Ge
     def validate_manifest(semantic_manifest: SemanticManifestT) -> Sequence[ValidationIssue]:  # noqa: D
         issues: List[ValidationIssue] = []
 
-        metrics_using_old_params: Set[str] = set()
         for metric in semantic_manifest.metrics or []:
             if metric.type != MetricType.CUMULATIVE:
                 continue
@@ -60,9 +59,6 @@ def validate_manifest(semantic_manifest: SemanticManifestT) -> Sequence[Validati
 
             for field in ("window", "grain_to_date"):
                 type_params_field_value = getattr(metric.type_params, field)
-                # Warn that the old type_params structure has been deprecated.
-                if type_params_field_value:
-                    metrics_using_old_params.add(metric.name)
 
                 # Warn that window or grain_to_date is mismatched across params.
                 cumulative_type_params_field_value = (
@@ -115,19 +111,6 @@ def validate_manifest(semantic_manifest: SemanticManifestT) -> Sequence[Validati
                             extra_detail="".join(traceback.format_tb(e.__traceback__)),
                         )
                     )
-        if metrics_using_old_params:
-            issues.append(
-                ValidationWarning(
-                    context=metric_context,
-                    message=(
-                        "Cumulative fields `type_params.window` and `type_params.grain_to_date` have been moved and "
-                        "will soon be deprecated. Please nest those values under "
-                        "`type_params.cumulative_type_params.window` and "
-                        "`type_params.cumulative_type_params.grain_to_date`. Metrics using old fields: "
-                        f"{sorted(metrics_using_old_params)}"
-                    ),
-                )
-            )
 
         return issues
 
diff --git a/tests/validations/test_metrics.py b/tests/validations/test_metrics.py
index 5439331f..efafeef0 100644
--- a/tests/validations/test_metrics.py
+++ b/tests/validations/test_metrics.py
@@ -66,8 +66,10 @@ def check_error_in_issues(error_substrings: List[str], issues: Tuple[ValidationI
     for expected_str in error_substrings:
         if not any(actual_str.as_readable_str().find(expected_str) != -1 for actual_str in issues):
             missing_error_strings.add(expected_str)
-    assert len(missing_error_strings) == 0, "Failed to match one or more expected issues: "
-    f"{missing_error_strings} in {set([x.as_readable_str() for x in issues])}"
+    assert len(missing_error_strings) == 0, (
+        "Failed to match one or more expected issues: "
+        + f"{missing_error_strings} in {set([x.as_readable_str() for x in issues])}"
+    )
 
 
 def test_metric_no_time_dim_dim_only_source() -> None:  # noqa:D
@@ -742,13 +744,11 @@ def test_cumulative_metrics() -> None:  # noqa: D
     )
 
     build_issues = validation_results.all_issues
-    assert len(build_issues) == 4
+    assert len(build_issues) == 3
     expected_substrings = [
         "Both window and grain_to_date set for cumulative metric. Please set one or the other.",
         "Got differing values for `window`",
         "Got differing values for `grain_to_date`",
-        "Cumulative fields `type_params.window` and `type_params.grain_to_date` have been moved",
-        str(sorted({"what_a_metric", "dis_bad", "woooooo", "metric1", "metric2"})),
     ]
     check_error_in_issues(error_substrings=expected_substrings, issues=build_issues)