There hasn't been a Peter/Ernie fight since 2012 so it's possible the writers have given up on the fights but sure if they wanted to finally kill Ernie off they could.
Ernie Bonelli died in 2009.
Ernie Whittam died in 1951.
Ernie Whittle died in 1998.
Ernie Quinn died in 1992.
Ernie Elliott died in 1972.
Ernie Royal died in 1983.
Ernie Sykes died in 1997.
Ernie Phypers died in 1960.
Ernie Renzel died in 2007.
Ernie Butler died in 2007.
Ernie Stevenson died in 1970.
Ernie Norman died in 1993.