Add comments on TC_EncodedReflectionCapture to indicate that it is vestigial

behavior nop
Use of it was removed in :
CL 22025079 Change the reflection capture's encoded HDR data to RG11B10 format.

#rb none
#preflight none

[CL 24433881 by charles bloom in ue5-main branch]

Engine/Source/Developer/Android/AndroidTargetPlatform/Private/AndroidTargetPlatform.cpp

@@ -502,6 +502,7 @@ void FAndroidTargetPlatform::GetTextureFormats( const UTexture* Texture, TArray<
 		{
 			FTextureFormatSettings FormatSettings;
 			Texture->GetDefaultFormatSettings(FormatSettings);
+			// TC_EncodedReflectionCapture is no longer used and could be deleted
 			if (FormatSettings.CompressionSettings == TC_EncodedReflectionCapture && !FormatSettings.CompressionNone)
 			{
 				TextureFormatName = FName(TEXT("ETC2_RGBA"));