Revert "#1 Support teamcity parallel flow output"

This reverts commit 5b2d0a9c49a5b4f5303770cb277f222711b0227e. (+2 squashed commit)

Squashed commit:

[411d931] Revert "#1 Include teamcity flowId with more parallel-specific output; Fix flowId not being escaped"

This reverts commit af4a230ff8e5e476ae506c5ecf94c775fcf6202f.

[7f77bb2] Revert "#1 Experimentally add blockOpened/blockClosed to teamcity output"

This reverts commit 87269b3971af9ef057057514553e39041e77fe1f.