add better comment and cleanup unnecessary sleep commands

test/test_visualization.jl

@@ -62,12 +62,11 @@ using CairoMakie
     @test_nowarn generate_mesh(p_visu, verbose=true)
 
     # Explicitly call the garbage collector to remove any temporaries
-    # before an attempt to delete any files
+    # before an attempt to delete any files. Helps avoid an error of type
+    #  `IOError: unlink("some_file"): resource busy or locked (EBUSY)`
+    # on Windows CI runners
     GC.gc()
 
-    # # Add a delay to ensure that the Windows system has released the file handles
-    # sleep(2.0) # arbitrarily pick 2 seconds
-
     # Destroy the mesh and reset the background grid
     @test_nowarn remove_mesh!(p_visu)
 
@@ -100,12 +99,11 @@ using CairoMakie
     @test_nowarn generate_mesh(p_visu)
 
     # Explicitly call the garbage collector to remove any temporaries
-    # before an attempt to delete any files
+    # before an attempt to delete any files. Helps avoid an error of type
+    #  `IOError: unlink("some_file"): resource busy or locked (EBUSY)`
+    # on Windows CI runners
     GC.gc()
 
-    # Add a delay to ensure that the Windows system has released the file handles
-    # sleep(2.0) # arbitrarily pick 2 seconds
-
     # Destroy the mesh and reset the background grid
     @test_nowarn remove_mesh!(p_visu)