Question: Problem with `remove` command

Dear friends, please I would like to ask for your help with an odd problem I have using the remove command. 

I have an array 


and I need to remove its first element A[1]. 

A:= remove[flatten](x -> x = A[1], A);

Instead of getting the result  A:= [4 1 7] I get  A:=[4 7], and I can't understand why. 

Could you please help me with a solution to the problem? Many thanks for the help.  


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