Remove unnecessary factory function prototype

Change-Id: I5fd41bca54c7b716003eea92e90ddfd08ebfa95a
Remove dead interlock code:

* Remove interlck_x86.s leftover from 417c85bf582e0d1dbabb7b0f16d60a394d537e61
  "fdo#72598 Remove SunStudio cruft from code base."

* osl_isSingleCPU is always 0.

Change-Id: I44f633d503af0a033a977e0f812e6bd6e4282fca
Fix ASCII-only check

...which did not work e.g. for broken single-byte input 0x80.

Change-Id: I4dff41e4f18dfce376695b438004c2af853cf4fa
Remove dead test code

Change-Id: Id03246fa9eefce718c36d73f84875f26d58caeba
Clean up unreferenced functions

Change-Id: Id9cb4dbeb6b3313974b881efd6a7c43cb5e314ce
Missing include

Change-Id: Ifbb916e72a00a9e9925fd12e7945f178d7ae200b
Clean up unreferenced functions

Change-Id: I1dbb864d030b61417f6d137fc967f158e9243ed7
Clean up unreferenced functions

Change-Id: I5abc0e587cfd81f1f94c604cb58725a2f84ed33d
Clean up unreferenced functions

Change-Id: Id2c90088298d389bd1cd8efad9aa26100965d6a2
Clean up unreferenced functions

Change-Id: Ie6560c806369a2d1698b4df43710f3aebb10ed6a