Dead code in sgx-lkl-musl

[David Chisnall]

We have several functions that were work-arounds for missing features that are now fixed. These have complicated some of the code cleanup, as seen in #815, where we're adding code to support these hacks. We should remove them and simplify the associated code:

• init_sysconf should be obsolete now that we're intercepting the sysconf system call.
• init_clock_res should be obsolete now that LKL is managing the clocks.

@SeanTAllen, you've touched some code related to both of these, I think. Can you take a look once #815 has landed?

[Christoph M. Wintersteiger]

See also #576

[Sean T Allen]

init_sysconf isn't dead code. only doing init_clock_res

[Sean T Allen]

PR opened #835