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inferred from git blame, and is often outdated.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

nfapi/open-nFAPI/fapi/inc/nr_fapi_p7_utils.h

@@ -18,16 +18,6 @@
  * For more information about the OpenAirInterface (OAI) Software Alliance:
  *      contact@openairinterface.org
  */
-/*! \file nfapi/open-nFAPI/fapi/inc/p5/nr_fapi_p5_utils.h
- * \brief
- * \author Ruben S. Silva
- * \date 2024
- * \version 0.1
- * \company OpenAirInterface Software Alliance
- * \email: contact@openairinterface.org, rsilva@allbesmart.pt
- * \note
- * \warning
- */
 
 #ifndef OPENAIRINTERFACE_NR_FAPI_P7_UTILS_H
 #define OPENAIRINTERFACE_NR_FAPI_P7_UTILS_H