record-full: Remove unused function netorder16

record-full: Remove unused function netorder16

clang shows this warning:

  /home/emaisin/src/binutils-gdb/gdb/record-full.c:2344:1: error: unused function 'netorder16' [-Werror,-Wunused-function]
  netorder16 (uint16_t input)
  ^

Remove this function, which, AFAIK, has never been used.  Note that GCC
doesn't warn about this, because the function is marked as inline.
According to gcc's man page, it should ideed not warn:

  -Wunused-function
    Warn whenever a static function is declared but not defined or a non-inline static function is unused.  This warning is enabled by -Wall.

So it's probably not a GCC bug that it doesn't find this unused function, but a
different definition of "unused".

gdb/ChangeLog:

	* record-full.c (netorder16): Remove.