Repository: godotengine/godot (language: cpp)

Issue:
Godot 3 project to Godot 4 conversion failed but nothing is displayed to the user
### Tested versions

Tested in 4.4.dev7 only.

### System information

Godot v4.4.dev7 - Windows 10 (build 19045) - Multi-window, 1 monitor - Vulkan (Forward+) - dedicated GeForce GTX 780M - Intel(R) Core(TM) i7-4700HQ CPU @ 2.40GHz (8 threads)

### Issue description

I tried to convert [this project](https://github.com/adcomp/Godot3_2D_Island_OpenSimplexNoise) to Godot 4 and it failed whatever option picked (full project or project file only).
The project conversion window shows **nothing at all**.

Although, in log, there are these:

> Starting conversion.
ERROR: Class "IPUnix" does not exist in Godot 4, so it cannot be used in the conversion.
   at: test_array_names (editor/project_converter_3_to_4.cpp:1172)
ERROR: Found function which is used in the converter, but it cannot be found in Godot 4. Rename this element or remove its entry if it's obsolete.
   at: test_array_names (editor/project_converter_3_to_4.cpp:1222)
ERROR: Cannot start converting due to problems with data in arrays.
   at: convert (editor/project_converter_3_to_4.cpp:334)

The error message regarding _IPUnix_ class is weird cause it is even not used in the project.
And this project is pretty small (one scene and one script), nothing fancy and just a few old stuff which have been modified like _export_ and _getset_ syntax, _lock/unlock_ functions of Image object no longer needed/available.

### Steps to reproduce

Download and convert the project given in the issue description.
No errors shown to the user.
Project list remain as it was before and the project doesn't appear in the list.

### Minimal reproduction project (MRP)

[this project](https://github.com/adcomp/Godot3_2D_Island_OpenSimplexNoise)


Discussion / hints:
Loading the project into the editor from the command line, using the -v -e command line parameters will actually see Godot loading the project more or less successfully but it displays a range of other errors. And the project will not run when launched.
When running the converter from project manager it doesn't display any errors, you need to look into console.
And yeah, converter seems to be broken right now, due to IPUnix class being gone.

Fix patch:
diff --git a/editor/renames_map_3_to_4.cpp b/editor/renames_map_3_to_4.cpp
index ca5d3cbf2ab7..278d57d73a6f 100644
--- a/editor/renames_map_3_to_4.cpp
+++ b/editor/renames_map_3_to_4.cpp
@@ -1523,7 +1523,6 @@ const char *RenamesMap3To4::class_renames[][2] = {
 	{ "GradientTexture", "GradientTexture2D" },
 	{ "HeightMapShape", "HeightMapShape3D" },
 	{ "HingeJoint", "HingeJoint3D" },
-	{ "IP_Unix", "IPUnix" },
 	{ "ImmediateGeometry", "ImmediateMesh" },
 	{ "ImmediateGeometry3D", "ImmediateMesh" },
 	{ "InterpolatedCamera", "Camera3D" },


Test patch: