diff --git a/manim/__main__.py b/manim/__main__.py
index c11ca88450..f05f4c2971 100644
--- a/manim/__main__.py
+++ b/manim/__main__.py
@@ -1,7 +1,5 @@
 from __future__ import annotations
 
-import sys
-
 import click
 import cloup
 
diff --git a/manim/mobject/mobject.py b/manim/mobject/mobject.py
index 1b5eed0d58..9b79f67111 100644
--- a/manim/mobject/mobject.py
+++ b/manim/mobject/mobject.py
@@ -2700,13 +2700,13 @@ def push_self_into_submobjects(self) -> Self:
 
     def add_n_more_submobjects(self, n: int) -> Self | None:
         if n == 0:
-            return
+            return None
 
         curr = len(self.submobjects)
         if curr == 0:
             # If empty, simply add n point mobjects
             self.submobjects = [self.get_point_mobject() for k in range(n)]
-            return
+            return None
 
         target = curr + n
         # TODO, factor this out to utils so as to reuse
diff --git a/manim/mobject/opengl/opengl_geometry.py b/manim/mobject/opengl/opengl_geometry.py
index 3e81f6f6f3..2ec0bbe4dd 100644
--- a/manim/mobject/opengl/opengl_geometry.py
+++ b/manim/mobject/opengl/opengl_geometry.py
@@ -23,7 +23,6 @@
 )
 
 DEFAULT_DOT_RADIUS = 0.08
-DEFAULT_SMALL_DOT_RADIUS = 0.04
 DEFAULT_DASH_LENGTH = 0.05
 DEFAULT_ARROW_TIP_LENGTH = 0.35
 DEFAULT_ARROW_TIP_WIDTH = 0.35
diff --git a/manim/mobject/table.py b/manim/mobject/table.py
index ff0c0f0bd9..1a1beffad1 100644
--- a/manim/mobject/table.py
+++ b/manim/mobject/table.py
@@ -74,7 +74,6 @@ def construct(self):
 from manim.mobject.text.tex_mobject import MathTex
 from manim.mobject.text.text_mobject import Paragraph
 
-from .. import config
 from ..animation.animation import Animation
 from ..animation.composition import AnimationGroup
 from ..animation.creation import Create, Write
diff --git a/manim/mobject/text/tex_mobject.py b/manim/mobject/text/tex_mobject.py
index 47cbe6cd96..029b5ce009 100644
--- a/manim/mobject/text/tex_mobject.py
+++ b/manim/mobject/text/tex_mobject.py
@@ -34,7 +34,7 @@
 from manim.constants import *
 from manim.mobject.geometry.line import Line
 from manim.mobject.svg.svg_mobject import SVGMobject
-from manim.mobject.types.vectorized_mobject import VectorizedPoint, VGroup, VMobject
+from manim.mobject.types.vectorized_mobject import VGroup, VMobject
 from manim.utils.tex import TexTemplate
 from manim.utils.tex_file_writing import tex_to_svg_file
 
diff --git a/manim/mobject/types/vectorized_mobject.py b/manim/mobject/types/vectorized_mobject.py
index 8312b74459..ec15646c31 100644
--- a/manim/mobject/types/vectorized_mobject.py
+++ b/manim/mobject/types/vectorized_mobject.py
@@ -26,20 +26,17 @@
 )
 
 import numpy as np
-import numpy.typing as npt
 from PIL.Image import Image
-from typing_extensions import Self
 
+from manim import config
+from manim.constants import *
+from manim.mobject.mobject import Mobject
 from manim.mobject.opengl.opengl_compatibility import ConvertToOpenGL
 from manim.mobject.opengl.opengl_vectorized_mobject import OpenGLVMobject
 from manim.mobject.three_d.three_d_utils import (
     get_3d_vmob_gradient_start_and_end_points,
 )
-
-from ... import config
-from ...constants import *
-from ...mobject.mobject import Mobject
-from ...utils.bezier import (
+from manim.utils.bezier import (
     bezier,
     get_smooth_handle_points,
     integer_interpolate,
@@ -47,11 +44,19 @@
     partial_bezier_points,
     proportions_along_bezier_curve_for_point,
 )
-from ...utils.color import BLACK, WHITE, ManimColor, ParsableManimColor
-from ...utils.iterables import make_even, resize_array, stretch_array_to_length, tuplify
-from ...utils.space_ops import rotate_vector, shoelace_direction
+from manim.utils.color import BLACK, WHITE, ManimColor, ParsableManimColor
+from manim.utils.iterables import (
+    make_even,
+    resize_array,
+    stretch_array_to_length,
+    tuplify,
+)
+from manim.utils.space_ops import rotate_vector, shoelace_direction
 
 if TYPE_CHECKING:
+    import numpy.typing as npt
+    from typing_extensions import Self
+
     from manim.typing import (
         BezierPoints,
         CubicBezierPoints,
@@ -1406,6 +1411,9 @@ def point_from_proportion(self, alpha: float) -> Point3D:
                 return curve(residue)
 
             current_length += length
+        raise Exception(
+            "Not sure how you reached here, please file a bug report at https://github.com/ManimCommunity/manim/issues/new/choose"
+        )
 
     def proportion_from_point(
         self,
diff --git a/manim/renderer/opengl_renderer.py b/manim/renderer/opengl_renderer.py
index 79390be97c..d457682267 100644
--- a/manim/renderer/opengl_renderer.py
+++ b/manim/renderer/opengl_renderer.py
@@ -219,9 +219,6 @@ def interpolate(self, *args, **kwargs):
         self.refresh_rotation_matrix()
 
 
-points_per_curve = 3
-
-
 class OpenGLRenderer:
     def __init__(self, file_writer_class=SceneFileWriter, skip_animations=False):
         # Measured in pixel widths, used for vector graphics