Revert "fetchLeverageTiers now has minQuote/minBase and maxQuote/maxBase"
Revert "fetchLeverageTiers now has minQuote/minBase and maxQuote/maxBase"

This reverts commit 048ba6cd06e395ed924dad0aee6ccd8016261e1a.

ccxt/ccxt,ccxt/ccxt,ccxt/ccxt,ccxt/ccxt,ccxt/ccxt