Remove redundant issue numbers from comments

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: timtreis

src/spatialdata_plot/pl/render.py

@@ -1136,7 +1136,7 @@ def _render_images(
 
     _, trans_data = _prepare_transformation(img, coordinate_system, ax)
 
-    # --- Apply image transforms (#508, #407) ---
+    # --- Apply image transforms ---
     transfunc = render_params.transfunc
     needs_transform = transfunc is not None or render_params.grayscale
 

tests/pl/test_render_images.py

@@ -152,7 +152,7 @@ def test_plot_correctly_normalizes_multichannel_images(self, sdata_raccoon: Spat
 
 
 # ---------------------------------------------------------------------------
-# Grayscale + transfunc visual tests (#508, #407)
+# Grayscale + transfunc visual tests
 # ---------------------------------------------------------------------------
 
 
@@ -225,7 +225,7 @@ def test_transfunc_wrong_output_channels_with_grayscale_raises(self, sdata_blobs
         plt.close("all")
 
 
-# Regression tests for #406: RGBA image support
+# Regression tests for RGBA image support
 class TestRGBDetection:
     """Unit tests for _is_rgb_image helper."""
 
@@ -261,7 +261,7 @@ def test_duplicate_channel_names_not_detected(self):
 
 
 class TestRGBARendering:
-    """Regression tests for #406: RGBA images rendered correctly."""
+    """Regression tests: RGBA images rendered correctly."""
 
     @staticmethod
     def _make_rgba_sdata(c_coords: list, alpha_val: float = 1.0) -> SpatialData: