Some markup features are sphinx-specific and
are not supported by current library. Some bug were
reported https://bugs.launchpad.net/doc8/+bug/1426503
about this, but it is not fixed and we need working
docs.
In current situation whole blocks of code are not shown
so i removed usages of error-inflicting directive :linenos:
Change-Id: I25e2d193b10d713bbe64fb227afb71310874bb9f