Remove unused 'status' variable

GCC (mips32 Buildbot) is complaining about unused variable.

This is follow up change for
    https://android-review.googlesource.com/#/c/212523/.

Change-Id: Id6ac2736d30f324f2cad68d8dabe409092f000ac
diff --git a/compiler/oat_writer.cc b/compiler/oat_writer.cc
index cf1c114..25c671e 100644
--- a/compiler/oat_writer.cc
+++ b/compiler/oat_writer.cc
@@ -753,21 +753,6 @@
         writer_->method_info_.push_back(info);
       }
 
-      if (kIsDebugBuild) {
-        // We expect GC maps except when the class hasn't been verified or the method is native.
-        const CompilerDriver* compiler_driver = writer_->compiler_driver_;
-        ClassReference class_ref(dex_file_, class_def_index_);
-        CompiledClass* compiled_class = compiler_driver->GetCompiledClass(class_ref);
-        mirror::Class::Status status;
-        if (compiled_class != nullptr) {
-          status = compiled_class->GetStatus();
-        } else if (compiler_driver->GetVerificationResults()->IsClassRejected(class_ref)) {
-          status = mirror::Class::kStatusError;
-        } else {
-          status = mirror::Class::kStatusNotReady;
-        }
-      }
-
       DCHECK_LT(method_offsets_index_, oat_class->method_offsets_.size());
       OatMethodOffsets* offsets = &oat_class->method_offsets_[method_offsets_index_];
       offsets->code_offset_ = quick_code_offset;