[pytorch] | [test] | [ec2]Remove the temp patch for PT example tests

[YYStreet]

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Checklist

• I've prepended PR tag with frameworks/job this applies to : [mxnet, tensorflow, pytorch] | [build] | [test] | [build, test] | [ec2, ecs, eks, sagemaker]
• (If applicable) I've documented below the DLC image/dockerfile this relates to
• (If applicable) I've documented below the tests I've run on the DLC image
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• (If applicable) I've scanned the updated and new binaries to make sure they do not have vulnerabilities associated with them.

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[YYStreet]

pytorch/examples#781
Fixing PR gets merged as official patch