Remove AutoDetectAndSetShaderMode method since it seems it does nothing

Except cause an exception because for some reason in one of the projects I get this:

```
System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
at System.Collections.Generic.List`1[T].get_Item (System.Int32 index) [0x00009] in :0
at ImmersiveVRTools.Editor.Common.WelcomeScreen.Utilities.AssetPathResolver.GetAssetFolderPathRelativeToScript (UnityEngine.ScriptableObject scriptableObject, System.Int32 folderDistanceFromFileRoot) [0x00022] in <9139b57e70db41b1b3e8ae7302e30088>:0
at FastScriptReload.Editor.FastScriptReloadPreference.SetCommonMaterialsShader (FastScriptReload.Editor.FastScriptReloadPreference+ShadersMode newShaderModeValue) [0x00001] in D:\git\borbeli\Assets\Plugins\Packages\handzlikchris.fastscriptreload\Source\Scripts\Editor\FastScriptReloadWelcomeScreen.cs:833
```

The reason I think it is not needed is that it calls FastScriptReloadPreference.SetCommonMaterialsShader which tries to set the shader on materials found in plugin's directory named Point but there are no materials in plugin's directory.

Comienza en FastScriptReloadWelcomeScreen.cs alrededor de la línea 833 e inspecciona AutoDetectAndSetShaderMode junto con FastScriptReloadPreference.SetCommonMaterialsShader. Confirma cómo la búsqueda del material Point provoca la excepción indicada cuando no existen materiales de plugin. Se considera terminado cuando la llamada innecesaria ya no provoca la excepción y el comportamiento relacionado está cubierto por las comprobaciones disponibles del proyecto.

Escrito por el modelo de indexación a partir del texto del issue.