Delete lines with highlighted text / delete highlighted text

Question

Does anyone know how to delete:

1. lines with highlighted text
2. all highlighted text self

(highlighted text (p.e. after a search) not selected text)

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Is there a command which search all highlighted text and delete the line? (independent which search command or function I used to highlight text)

the g/pattern/d command does not always delete the highlighted text
p.e. /^\(.*\)\(\n\1\)\+$ --> highlight all double lines
but g/^\(.*\)\(\n\1\)\+$/d --> does NOT delete all double lines

Answer 1

Well, you can delete the searched pattern this way:

:%s/<pattern>//gc

And you can delete the whole line with the searched pattern this way:

:g/<pattern>/d