Do not use .umap for files in this repo

For projects that use git LFS for their assets, having a .umap file here will produce the following when doing git subtree add:

PS D:\Dev\Projects\XCom 2 WOTC\CovertInfiltration> git subtree add --prefix .scripts/X2ModBuildCommon https://github.com/X2CommunityCore/X2ModBuildCommon main --squash

git fetch https://github.com/X2CommunityCore/X2ModBuildCommon main
remote: Enumerating objects: 136, done.
remote: Counting objects: 100% (136/136), done.
remote: Compressing objects: 100% (85/85), done.
Receiving objects:  76% (104/136)136 (delta 83), reused 101 (delta 51), pack-reused 0
Receiving objects: 100% (136/136), 148.90 KiB | 447.00 KiB/s, done.
Resolving deltas: 100% (83/83), done.
From https://github.com/X2CommunityCore/X2ModBuildCommon
 * branch            main       -> FETCH_HEAD
Encountered 1 file(s) that should have been pointers, but weren't:
        .scripts/X2ModBuildCommon/EmptyMap.umap
Unstaged changes after reset:
M       .scripts/X2ModBuildCommon/EmptyMap.umap
Added dir '.scripts/X2ModBuildCommon'
PS D:\Dev\Projects\XCom 2 WOTC\CovertInfiltration> git log -2

commit ffbd3085b6f7aaafedcc891bb892b38679613a85 (HEAD -> cooker-experiments-b3)
Merge: b6ce587 139c258
Author: Xymanek <[email protected]>
Date:   Fri May 21 10:07:51 2021 +0300

    Merge commit '139c2585a7305ecdd1f01a62e486750b9049c302' as '.scripts/X2ModBuildCommon'

commit 139c2585a7305ecdd1f01a62e486750b9049c302
Author: Xymanek <[email protected]>
Date:   Fri May 21 10:07:51 2021 +0300

    Squashed '.scripts/X2ModBuildCommon/' content from commit 81ab7a4

    git-subtree-dir: .scripts/X2ModBuildCommon
    git-subtree-split: 81ab7a45821909902aa0cadea8fc345b26bdcaac

PS D:\Dev\Projects\XCom 2 WOTC\CovertInfiltration> git status

On branch cooker-experiments-b3
Your branch is ahead of 'origin/cooker-experiments-b3' by 3 commits.
  (use "git push" to publish your local commits)

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
        modified:   .scripts/X2ModBuildCommon/EmptyMap.umap

Notice the EmptyMap.umap lines.

I didn't test, but I assume git LFS would keep getting confused when doing updates and similar