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inferred from git blame, and is often outdated.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

openair2/PHY_INTERFACE/IF_Module.h

@@ -18,16 +18,9 @@
  *      contact@openairinterface.org
  */
 
-/*! \file openair2/PHY_INTERFACE/IF_Module.h
-* \brief data structures for PHY/MAC interface modules
-* \author EURECOM/NTUST
-* \date 2017
-* \version 0.1
-* \company Eurecom
-* \email: raymond.knopp@eurecom.fr
-* \note
-* \warning
-*/
+/*!
+ * \brief data structures for PHY/MAC interface modules
+ */
 #ifndef __IF_MODULE__H__
 #define __IF_MODULE__H__