Restrict scope for NumberOfReads attribute

ext/QUBOTools_MOI/num_reads.jl

@@ -7,6 +7,8 @@ struct NumberOfReads <: MOI.AbstractModelAttribute
     result_index::Int
 
     function NumberOfReads(result_index::Integer = 1)
+        @assert result_index > 0
+
         new(result_index)
     end
 end
@@ -15,18 +17,6 @@ function MOI.is_set_by_optimize(::NumberOfReads)
     return true
 end
 
-function MOI.supports(::MOI.ModelLike, ::NumberOfReads)
-    return true
-end
-
-function MOI.get(model::MOI.ModelLike, attr::NumberOfReads)
-    MOI.check_result_index_bounds(model, attr)
-
-    # By default, solvers that do not implement their own method
-    # will not account for solution multiplicity.
-    return 1
-end
-
 # The function takes no arguments and returns the NumberOfReads type.
 # Other packages will assign its return value to a constant, e.g.,
 #