More unused locals and parameter removal and unused parameter warning suppression.

R=dimvar


Revision created by MOE tool push_codebase.
MOE_MIGRATION=6122


git-svn-id: http://closure-compiler.googlecode.com/svn/trunk@2457 b0f006be-c8cd-11de-a2e8-8d36a3108c74

Remove duplicate diagnostic group

R=dimvar
DELTA=8 (0 added, 5 deleted, 3 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=6123


git-svn-id: http://closure-compiler.googlecode.com/svn/trunk@2458 b0f006be-c8cd-11de-a2e8-8d36a3108c74