to eliminate the endless strength —

to eliminate his fatigue (from killing hiraṇya) —

there is nothing that we need to do (pravruththi) as means —

 to go —

 to eliminate —

 to be eliminated —

to remove the brahmahaththi curse (due to harming a brāhmaṇa; in this case brahmā) —

to destroy his inner strength —

not affected —

to destroy —

to be rid of —

to be cured (of its fever) —