Revert "uploader: add rpc method GetExperiment to ExporterService (#3614)" (#3659)
Revert "uploader: add rpc method GetExperiment to ExporterService (#3614)" (#3659)

This reverts commit 2067b2569f72edca0979f81a7267b18e7a56e2e2.

Reverts tensorflow/tensorboard#3614 to resolve internal proto service
method name duplication. Will roll forward with fix later.
tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard