Cleanup: Unused alloca definitions and includes

src/core/alloc_func.hpp

@@ -128,9 +128,4 @@ static inline T *ReallocT(T *t_ptr, size_t num_elements)
 	return t_ptr;
 }
 
-/** alloca() has to be called in the parent function, so define AllocaM() as a macro */
-#define AllocaM(T, num_elements) \
-	(CheckAllocationConstraints<T>(num_elements), \
-	(T*)alloca((num_elements) * sizeof(T)))
-
 #endif /* ALLOC_FUNC_HPP */