config: Remove incorrect "after the container namespaces are created"
config: Remove incorrect "after the container namespaces are created"

Not all hooks are run after creation.  In fact, there are currently no
postcreate hooks (prestart hooks are called "after the start operation
is called but before the user-specified program command is executed".

Fixing 28e8f68 (Hooks to linux,solaris and doc clarification,
2017-05-24, #855), which pulled the broken line in from a Go comment
[1].

[1]: https://github.com/opencontainers/runtime-spec/pull/855#discussion_r118341546

Signed-off-by: W. Trevor King <f75897670c17327c42ab201733fb8a81ff9f4c34@tremily.us>

opencontainers/specs,hqhq/specs,laijs/specs,hqhq/runtime-spec,wking/opencontainer-runtime-spec,wking/opencontainer-specs,opencontainers/runtime-spec