Remove notes fol PLS_v1.

If required, they are still in the history. However, they are not up to date and thus mostly confuling.
3 jobs from master in 4 minutes 44 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #4044
build_cmake

01:11

 
  Test
passed #4045
run_tests

01:12

 
  Sanitizer
passed #4046
run_address_sanitizer

02:21