**System Information**
Operating system: Linux-4.13.10-041310-generic-x86_64-with-debian-stretch-sid 64 Bits
Graphics card: GeForce GTX 1050/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.67
**Blender Version**
Broken: version: 2.81 (sub 15), branch: master, commit date: 2019-10-24 19:00, hash: `rB892c3891ed0b`
**Short description of error**
The `bpy.ops.image.unpack()` operator has the option to just remove packing (and I assume not writing anything), it's called 'Remove Pack' in the menu. See screenshot.
{F7866567}
The python reference in the tooltip for this operator is `bpy.ops.image.unpack(method='<UNKNOWN ENUM>', ... )`.
Despite the faulty(?) method argument, it seams to work without an issue.
The unpack method on an image `bpy.data.images['normal.png'].unpack()`, which can do the same, only has the following items for the enum: `{'USE_LOCAL', 'WRITE_LOCAL', 'USE_ORIGINAL', 'WRITE_ORIGINAL}`
I'm wondering if there is one method missing, the once currently called 'Remove Pack`/`<UNKNOWN ENUM` in the operator.