Revert "Fix LSRA bug with explicit register temporaries"

register_allocator_test32 fails.

This reverts commit 283b8541546e7673d33d104241623d07c91cf500.

Change-Id: I2a46f3c68de3e8273e402102065c13797045c481
diff --git a/compiler/optimizing/locations.h b/compiler/optimizing/locations.h
index 4b25046..f41a782 100644
--- a/compiler/optimizing/locations.h
+++ b/compiler/optimizing/locations.h
@@ -427,11 +427,11 @@
     }
   }
 
-  bool ContainsCoreRegister(uint32_t id) const {
+  bool ContainsCoreRegister(uint32_t id) {
     return Contains(core_registers_, id);
   }
 
-  bool ContainsFloatingPointRegister(uint32_t id) const {
+  bool ContainsFloatingPointRegister(uint32_t id) {
     return Contains(floating_point_registers_, id);
   }