SHELL

vim remove line by pattern from all files

" To delete empty lines or lines with white spaces (s)
:g/^s*$/d

vim delete all lines

:1,$d

vim delete every other line

:1d|g/^/+d  # Every other odd line

vim delete every other line

:g/^/+d  # Every other even line

Vim deleting all lines containing pattern

//Delete all lines containing profile
:g/profile/d