Miami Heat's FTX Arena

FTX Arena is no more -- the Miami Heat's home will be scrubbed of the failed cryptocurrency exchange's branding immediately, a judge ruled Wednesday.

Sam Bankman-Fried's company bought the naming rights to the facility -- formerly known as American Airlines Arena -- in 2021 for $135 million ... but as the exchange faces serious allegations of fraud and mishandling customer funds, the Heat and Miami-Dade County made it clear a change was necessary.

Of course, FTX -- which was one of the largest crypto exchanges in the world -- filed for bankruptcy in November ... and SBF has since been charged with conspiracy to commit wire fraud, wire fraud, conspiracy to commit commodities fraud, conspiracy…