Remove unused strings from index.english

Signed-off-by: emanuele <emanuele45@gmail.com>
These are with a probability of 99% not used anywhere and leftovers from SMF 1.0/1 or Penguin

Signed-off-by: emanuele <emanuele45@gmail.com>
And these are either not used or used in a way that is impossible to detect, so: goodbye!

Signed-off-by: emanuele <emanuele45@gmail.com>
Certain kind of errors in the log should make the build fail

Signed-off-by: emanuele <emanuele45@gmail.com>
Merge pull request #1701 from emanuele45/strings

Strings