Removed unnecessary .to() call since it has no effect before .cuda()

[lounishamroun]

Fixes #3782

Description

Removed unnecessary .to() in the generate_data function.

Checklist

• The issue that is being fixed is referred in the description (see above "Fixes #ISSUE_NUMBER")
• Only one issue is addressed in this pull request
• Labels from the issue that this PR is fixing are added to this pull request
• No unnecessary issues are included into this pull request.

cc @williamwen42 @msaroufim @anijain2305 @angelayi

[pytorch-bot]

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