Remove unused-variable in multipy/runtime/interpreter/interpreter_impl.cpp +3

Summary:
LLVM-15 has a warning `-Wunused-variable` which we treat as an error because it's so often diagnostic of a code issue. Unused variables can compromise readability or, worse, performance.

This diff either (a) removes an unused variable and, possibly, it's associated code or (b) qualifies the variable with `[[maybe_unused]]`.

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Reviewed By: wuyuoss

Differential Revision: D66143559

fbshipit-source-id: 5c3b7fe512f6fd29481a759d06291d8e930a51ff

Author: r-barnes

multipy/runtime/interpreter/interpreter_impl.cpp

@@ -360,7 +360,6 @@ struct __attribute__((visibility("hidden"))) ConcreteInterpreterObj
 
   torch::deploy::Obj attr(const char* attribute) override {
     MULTIPY_SAFE_RETHROW {
-      bool a = hasattr(attribute);
       py::object pyObj = getPyObject().attr(attribute);
       std::shared_ptr<ConcreteInterpreterObj> cObj =
           std::make_shared<ConcreteInterpreterObj>(pyObj, owningSession_);