ART: Fix "unused parameters"

GCC 4.8 decides that parameters for functions implemented with
"= default" are unused. This currently only impacts x86, but remove
the parameter names anyways.

Change-Id: I01865faa81af68c4c0e0b1cb1fb19e88ef548769
diff --git a/cmdline/token_range.h b/cmdline/token_range.h
index 50c54fe..5b54384 100644
--- a/cmdline/token_range.h
+++ b/cmdline/token_range.h
@@ -90,10 +90,10 @@
   }
 
   // Non-copying copy constructor.
-  TokenRange(const TokenRange& other) = default;
+  TokenRange(const TokenRange&) = default;
 
   // Non-copying move constructor.
-  TokenRange(TokenRange&& other) = default;
+  TokenRange(TokenRange&&) = default;
 
   // Non-copying constructor. Retains reference to an existing list of tokens, with offset.
   explicit TokenRange(std::shared_ptr<TokenList> token_list)