diff --git a/pandas/core/internals/__init__.py b/pandas/core/internals/__init__.py
index fb14c5ad82f4f..31234fb1f116f 100644
--- a/pandas/core/internals/__init__.py
+++ b/pandas/core/internals/__init__.py
@@ -35,8 +35,6 @@ def __getattr__(name: str):
         return create_block_manager_from_blocks
 
     if name in [
-        "NumericBlock",
-        "ObjectBlock",
         "Block",
         "ExtensionBlock",
         "DatetimeTZBlock",
@@ -49,11 +47,7 @@ def __getattr__(name: str):
             # on hard-coding stacklevel
             stacklevel=2,
         )
-        if name == "NumericBlock":
-            from pandas.core.internals.blocks import NumericBlock
-
-            return NumericBlock
-        elif name == "DatetimeTZBlock":
+        if name == "DatetimeTZBlock":
             from pandas.core.internals.blocks import DatetimeTZBlock
 
             return DatetimeTZBlock
@@ -61,13 +55,9 @@ def __getattr__(name: str):
             from pandas.core.internals.blocks import ExtensionBlock
 
             return ExtensionBlock
-        elif name == "Block":
+        else:
             from pandas.core.internals.blocks import Block
 
             return Block
-        else:
-            from pandas.core.internals.blocks import ObjectBlock
-
-            return ObjectBlock
 
     raise AttributeError(f"module 'pandas.core.internals' has no attribute '{name}'")
diff --git a/pandas/core/internals/blocks.py b/pandas/core/internals/blocks.py
index 80c8a1e8ef5c7..aa2c94da6c4d7 100644
--- a/pandas/core/internals/blocks.py
+++ b/pandas/core/internals/blocks.py
@@ -2148,18 +2148,6 @@ def is_numeric(self) -> bool:  # type: ignore[override]
         return kind in "fciub"
 
 
-class NumericBlock(NumpyBlock):
-    # this Block type is kept for backwards-compatibility
-    # TODO(3.0): delete and remove deprecation in __init__.py.
-    __slots__ = ()
-
-
-class ObjectBlock(NumpyBlock):
-    # this Block type is kept for backwards-compatibility
-    # TODO(3.0): delete and remove deprecation in __init__.py.
-    __slots__ = ()
-
-
 class NDArrayBackedExtensionBlock(EABackedBlock):
     """
     Block backed by an NDArrayBackedExtensionArray
diff --git a/pandas/tests/internals/test_api.py b/pandas/tests/internals/test_api.py
index 7c1d3ff774d0a..5bff1b7be3080 100644
--- a/pandas/tests/internals/test_api.py
+++ b/pandas/tests/internals/test_api.py
@@ -40,8 +40,6 @@ def test_namespace():
 @pytest.mark.parametrize(
     "name",
     [
-        "NumericBlock",
-        "ObjectBlock",
         "Block",
         "ExtensionBlock",
         "DatetimeTZBlock",
@@ -53,11 +51,6 @@ def test_deprecations(name):
     with tm.assert_produces_warning(DeprecationWarning, match=msg):
         getattr(internals, name)
 
-    if name not in ["NumericBlock", "ObjectBlock"]:
-        # NumericBlock and ObjectBlock are not in the internals.api namespace
-        with tm.assert_produces_warning(DeprecationWarning, match=msg):
-            getattr(api, name)
-
 
 def test_make_block_2d_with_dti():
     # GH#41168