Fix build. Remove unused declaration.

Change-Id: I3efef12c816518aa2753d7019de113e68966e760
diff --git a/src/compiler_llvm/compiler_llvm.cc b/src/compiler_llvm/compiler_llvm.cc
index b793fbd..db4ad0a 100644
--- a/src/compiler_llvm/compiler_llvm.cc
+++ b/src/compiler_llvm/compiler_llvm.cc
@@ -187,7 +187,7 @@
 extern "C" art::CompiledMethod* ArtCompileMethod(art::Compiler& compiler,
                                                  const art::DexFile::CodeItem* code_item,
                                                  uint32_t access_flags, uint32_t method_idx,
-                                                 const art::ClassLoader* class_loader,
+                                                 art::ClassLoader* class_loader,
                                                  const art::DexFile& dex_file)
 {
   art::ClassLinker *class_linker = art::Runtime::Current()->GetClassLinker();