Remove most doxygen file-level commands, copyrights, and authors

Remove the \file directive, as it is always superfluous  because the
current file is implicit [1]:

> If the file name is omitted (i.e. the line after \file is left blank)
> then the documentation block that contains the \file command will belong
> to the file it is located in.

Author names and e-mails are not relevant for us: it can always be
inferred from git blame, and is often outdated.

Eurecom code has been contributed and was under OAI PL v1.0/v1.1.

For the cpack package contact: put generic email address that is
independent of an individual and that will remain reachable.

[1] https://www.doxygen.nl/manual/commands.html#cmdfile

common/utils/websrv/helpfiles/softmodem_show_threadsched_priority.html

@@ -19,16 +19,9 @@
  * For more information about the OpenAirInterface (OAI) Software Alliance:
  *      contact@openairinterface.org
  */
-/*! \file common/utils/websrv/helpfiles/softmodem_show_threadsched_priority.html
+/*!
  * \brief: implementation of web interface frontend for oai
  * \help file loaded at run time using the help api's
- * \author:  Yacine  El Mghazli, Francois TABURET
- * \date 2022
- * \version 0.1
- * \company NOKIA BellLabs France
- * \email: yacine.el_mghazli@nokia-bell-labs.com  francois.taburet@nokia-bell-labs.com
- * \note: html tags cannot be used in this help files as it is rendered in a tooltips 
- * \warning
  */
 -->
 Linux priority field, relevant for real-time scheduling mode (Round-Robin or fifo) can be modified using the "oai priority" field