Remove existing Tor control log visualizations
As found in #33258 (moved), the existing Tor control log visualizations are not really useful to us. Let's consider removing them.
As part of this change, we should rename the TGen visualizations .pdf and .csv to something starting with onionperf.*, as these files will contain parts from TGen and TorCtl in the future (error codes from TorCtl logs, measurements filtered by relay fingerprints).
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