chore: remove dead uv-init scaffolding (pyproject/uv.lock/.python-version)

These were the remaining `uv init` residue alongside the already-removed
main.py stub — not part of the build/deploy path. Also drops the now-stale
'leftover uv-init artifacts' note from CLAUDE.md since the files are gone.

.python-version

@@ -1 +0,0 @@
-3.12

CLAUDE.md

@@ -21,9 +21,6 @@ instamesh-docker/
     compose.yml         # GPU compose, named volume for model cache, port 43839
     requirements.txt    # InstantMesh's pip deps, kept here so the Dockerfile
                         # can ADD them without changing the upstream tree
-  main.py, pyproject.toml, uv.lock, .python-version
-                        # leftover uv scaffolding from initial repo init;
-                        # NOT part of the build path. Don't extend these.
   README.md
   CLAUDE.md
 ```

pyproject.toml

@@ -1,7 +0,0 @@
-[project]
-name = "instamesh-docker"
-version = "0.1.0"
-description = "Add your description here"
-readme = "README.md"
-requires-python = ">=3.12"
-dependencies = []

uv.lock

@@ -1,8 +0,0 @@
-version = 1
-revision = 3
-requires-python = ">=3.12"
-
-[[package]]
-name = "instamesh-docker"
-version = "0.1.0"
-source = { virtual = "." }