Removing an unused variable

[trivial]

This is causing build failures in developer mode for gcc/4.8.0.
Note that I cleaned this up in the simplest, but maybe not
most elegant, way possible.  I wanted to get it cleaned up
before tonight's tests ran, but am open to someone (it's Tom's
code) cleaning it up more after the fact.



git-svn-id: http://svn.code.sf.net/p/chapel/code/trunk@21836 3a8e244f-b0f2-452b-bcba-4c88e055c3ca
Removing accidental commit of additional locale.id optimization

[reviewed by David]

I didn't look closely enough when I did my merge for r21814 (revamp of
on statements), so I accidentally added an extra version of the same
code that does the locale.id optimization.  Oops.



git-svn-id: http://svn.code.sf.net/p/chapel/code/trunk@21837 3a8e244f-b0f2-452b-bcba-4c88e055c3ca