simple script based on xclip to filter out stuff from the clipboard

clip-cleaner.sh

#!/bin/bash

# put current clipboard in a variable
XCLIP_CLIPBOARD="$(xclip -o -selection clipboard)"
XCLIP_SELECTION=$XCLIP_CLIPBOARD

if [ $# -ge 1 ]
then
  # print the initial string aka the current clipboard
  echo "=> 1st string: $XCLIP_CLIPBOARD"
  echo
  # Double quotes on "$@" are needed, else strings like 'a ' will be filtered as 'a'
  for FILTER in "$@"
  do
    echo "=> filter out: '$FILTER'"
    echo "=> old string: '$XCLIP_SELECTION'"
    # filtering stuff out the bash way
    XCLIP_SELECTION="${XCLIP_SELECTION/$FILTER/}"
    echo "=> new string: '$XCLIP_SELECTION'"
    echo
  done
  # copy the result to selection
  xclip <<< "$XCLIP_SELECTION"
  echo "=> clipboard: '$XCLIP_CLIPBOARD'"
  echo "=> selection: '$XCLIP_SELECTION'"

else
  echo "=> Please provide at least one string to filter out!"
fi

Initial string:

xclip -o -selection clipboard
https://gist.github.com/manero6/87436287a64f32032f0b8d66aad35a23

Filtering out strings:

clip-cleaner.sh https:// manero6/ gist. github.com/
=> 1st string: https://gist.github.com/manero6/87436287a64f32032f0b8d66aad35a23

=> filter out: https://
=> old string: https://gist.github.com/manero6/87436287a64f32032f0b8d66aad35a23
=> new string: gist.github.com/manero6/87436287a64f32032f0b8d66aad35a23

=> filter out: manero6/
=> old string: gist.github.com/manero6/87436287a64f32032f0b8d66aad35a23
=> new string: gist.github.com/87436287a64f32032f0b8d66aad35a23

=> filter out: gist.
=> old string: gist.github.com/87436287a64f32032f0b8d66aad35a23
=> new string: github.com/87436287a64f32032f0b8d66aad35a23

=> filter out: github.com/
=> old string: github.com/87436287a64f32032f0b8d66aad35a23
=> new string: 87436287a64f32032f0b8d66aad35a23

After that printing xclip clipboard (which should remain unchanged) and selection (which should contain the final filtered string)

xclip -o selection clipboard
https://gist.github.com/manero6/87436287a64f32032f0b8d66aad35a23

xclip
87436287a64f32032f0b8d66aad35a23