Miscellaneous code cleanup. Add a formal API for hooks to manipulate overrideVersions and upperBoundsExcludes, as the only way for them to do this today is through directly manipulating arguments, which makes it all too easy for different hooks to clobber each other. Also removed some dead code.
Miscellaneous code cleanup. Add a formal API for hooks to manipulate
overrideVersionsandupperBoundsExcludes, as the only way for them to do this today is through directly manipulating arguments, which makes it all too easy for different hooks to clobber each other. Also removed some dead code.