opts: TestParseDockerDaemonHost(), TestParseTCP() remove workaround
opts: TestParseDockerDaemonHost(), TestParseTCP() remove workaround

This was added in 683766613a8c1dca8f95b19ddb7e083bb3aef266, to workaround
changes in error between go 1.12.8 / go 1.11.13, causing the test to fail.

We no longer test against those versions, so we can remove this workaround.

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

jimjag/docker,moul/docker,jimjag/docker,thaJeztah/docker,cpuguy83/docker,jimjag/docker,nawawi/docker,konstruktoid/docker-upstream,vdemeester/docker,moby/moby,trebonian/docker,konstruktoid/docker-upstream,flavio/docker,moby/moby,cpuguy83/docker,thaJeztah/docker,thaJeztah/docker,flavio/docker,nawawi/docker,konstruktoid/docker-upstream,Mokolea/docker,mahak/docker,thaJeztah/docker,trebonian/docker,mahak/docker,Mokolea/docker,jimjag/docker,moby/moby,Mokolea/docker,flavio/docker,vdemeester/docker,Mokolea/docker,flavio/docker,mahak/docker,cpuguy83/docker,moby/moby,mahak/docker,vdemeester/docker,Ramzec/docker,moul/docker,nawawi/docker,Ramzec/docker,nawawi/docker,trebonian/docker,cpuguy83/docker,konstruktoid/docker-upstream,Ramzec/docker,moul/docker,Ramzec/docker,trebonian/docker,moul/docker