I wouldn't do that. Manufacturing is a game of pennies and no one puts materials where they don't serve a purpose. That brace is there for a reason and removing it may not cause immediate disaster but you increase your chances by reducing the overall strength.
Even the flimsy braces are very strong in tension (which is how they are stressed when the tank is holding water).
I would suggest you leave it.
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-Mark
29 Gal Bowfront w/24" LED Lights. DIY HOB Sump (5.4 Gal) MP40. Orange Spotted Watchman Goby, 2 Clownfish and a few hermits.
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