Remove unused NSE library requires

for lib in nselib/*.lua*; do l=${lib#*/}; l=${l%.lua*}; find . -name \
  \*.lua -o -name \*.nse | xargs grep -l "require .$l\>" | xargs grep \
  -c "\<$l\." | grep ':0$' | awk -F: '{print "'$l'", $1}'; done

Did not remove calls to stdnse.silent_require since these can be used to
abort script execution if OpenSSL is not included, even if the script
does not directly call openssl.* (perhaps it uses comm.tryssl instead,
for instance).

Also did not remove require "strict", since that library is special and
modifies the environment.

nselib/data/http-devframework-fingerprints.lua

@@ -2,7 +2,6 @@ local http = require "http"
 local io = require "io"
 local string = require "string"
 local table = require "table"
-local url = require "url"
 
 ---
 -- http-devframework-fingerprints.lua