Delete .gitattributes

[khaledsulayman]

It seems like at some point when I was working on #364 (likely back when I was trying to stage and push the 4GB .gguf file), a .gitattributes file was generated. This seems to confuse setuptools-scm during the release process, leading it to name the buld for v0.6.0 as v.0.6.1.dev0, since it was expecting the files in .gitattributes to be git LFS objects. This fix removes .gitattributes, as we aren't actually using LFS at all.

[tiran]

For the record, the file was not only confusing setuptools-scm. It was also confusing regular git clients. The model file was stored as a regular git object, but the .gitattribute file had *.model filter=lfs diff=lfs merge=lfs -text. This caused these warnings, which then confused setuptools-scm.

$ git reset --hard
HEAD is now at 01fbe02 Merge pull request #386 from instructlab/dependabot/github_actions/DavidAnson/markdownlint-cli2-action-18.0.0
Encountered 1 file that should have been a pointer, but wasn't:
        tests/testdata/models/instructlab/granite-7b-lab/tokenizer.model
$ git status
Not currently on any branch.
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:   tests/testdata/models/instructlab/granite-7b-lab/tokenizer.model

no changes added to commit (use "git add" and/or "git commit -a")