Remove torchdata from list of packages to source from the PyTorch index (#18703)

## Summary

All versions are on PyPI, and newer versions are seemingly only
published on PyPI.

Closes https://github.com/astral-sh/uv/issues/18699.

crates/uv-torch/src/backend.rs

@@ -332,7 +332,6 @@ impl TorchStrategy {
                         | "torchaudio"
                         | "torchcodec"
                         | "torchcsprng"
-                        | "torchdata"
                         | "torchdistx"
                         | "torchrec"
                         | "torchserve"
@@ -368,7 +367,6 @@ impl TorchStrategy {
                         | "torchaudio"
                         | "torchcodec"
                         | "torchcsprng"
-                        | "torchdata"
                         | "torchdistx"
                         | "torchrec"
                         | "torchserve"
@@ -405,7 +403,6 @@ impl TorchStrategy {
                 | "torchaudio"
                 | "torchcodec"
                 | "torchcsprng"
-                | "torchdata"
                 | "torchdistx"
                 | "torchrec"
                 | "torchtext"