delete all remote branches that have already been merged into master

gistfile1.sh

$ git branch -r --merged |
  awk -F"/" '!/(>|master)/ {print $2}' |
  xargs -L1 git push origin --delete

gistfile1.txt

$ git branch -r --merged | 
  grep origin | 
  grep -v '>' | 
  grep -v master | 
  xargs -L1 | 
  awk '{split($0,a,"/"); print a[2]}' | 
  xargs git push origin --delete

gistfile2.txt

$ git branch -r --merged | 
  grep origin | 
  grep -v '>' | 
  grep -v master | 
  xargs -L1 | 
  awk '{split($0,a,"/"); print a[2]}' | 
  xargs git push origin --delete