Trump's power as president doesn't give him authority to delete the federal reserve technically but if he was serious about going after the middle men there is no greater middle men then the "member banks" who own stock in the 12 Federal Reserve Banks.
This stock is not traded publicly and grants a statutory dividend, all remaining profits are then transferred to the US Treasury.
After the pandemic the Fed no longer transfers profits to the Treasury. As of Nov. 8, 2023, the Fed had accumulated a deferred asset.
These deferred assets theoretically could become unpayable under certain financial conditions. Like under a national cataclysmic economic condition, like under a trade war.
If those assets are unpayable simply the federal reserve will no longer have any legal basis to exist under their congressional mandate which is to promote maximum employment and price stability.
The federal reserve at the end of the day isn't all powerful in our country the government grants the power to the federal reserve under congressional mandate and if it no longer served the interests of the government or the United States they wouldn't keep it.