eth/tracers/logger: do not include elapsed time in evm output

[holiman]

When working with evm traces, in tools like goevmlab, it's a bit annoying when traces are not deterministic.

Example:

{"pc":2619,"op":80,"gas":"0x13a8","gasCost":"0x2","memSize":2240,"stack":["0x7dce2faf43218578e3fcf2ad22df9918a89e2fba"],"depth":1,"refund":0,"opName":"POP"}
{"pc":2620,"op":0,"gas":"0x13a6","gasCost":"0x0","memSize":2240,"stack":[],"depth":1,"refund":0,"opName":"STOP"}
{"output":"","gasUsed":"0xb2e6d","time":4638993}
{"stateRoot": "ad1024c87b5548e77c937aa50f72b6cb620d278f4dd79bae7f78f71ff75af458"}

The time is what makes the output change, and does not really bring a whole lot of added value. This PR removes the time element on the output line.

cc @s1na didn't you also gripe about this at some point?

Compatibility note

This introduces a backwards-incompatible change in the native tracing interface. The paramter t time.Duration is dropped from CaptureEnd.

[s1na]

Yes on-board with this. I went ahead and wiped it from the logger interface. If a tracer needs the time they can measure it themselves. No need for evm to do this.

[s1na]

LGTM

[holiman]

I went ahead and wiped it from the logger interface. If a tracer needs the time they can measure it themselves. No need for evm to do this.

SGTM 👍