Loughnane, 45, was planning to fight the allegations he assaulted his girlfriend Maryam Hamka nine months before he murdered her in his Melbourne apartment.
But prosecutors on Friday withdrew the charges of intentionally causing injury, recklessly causing injury, aggravated assault and committing an indictable offence while on bail.
Magistrate Carolyn Burnside in February urged prosecutors to reconsider the charges because a Supreme Court judge had already considered the offending in Loughnane's murder sentence.
Justice Christopher Beale had explicitly referenced the July 2020 incident where Ms Hamka went to a Coles store with swollen eyes and lips, injuries to her wrists and bleeding from her nose.
She disclosed to the workers that her boyfriend had bashed her, put his fingers down her throat and placed a sock in her mouth, and she thought she would die.
Justice Beale accepted the incident was evidence of violence committed by Loughnane against Ms Hamka.
A jury found Loughnane killed Ms Hamka in the early hours of April 11, 2021, and later dumped her body in a shallow grave in Cape Schanck.
Justice Beale sentenced Loughnane to 28 years behind bars for Ms Hamka's murder.
He will be eligible for parole after 20 years.
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