base: Remove hostname from hostinfo

This function is not used anywhere.

In addition, gethostname uses a fixed host name, and
sethostname is not implemented (sim/syscall_emul). If
we were to handle sethostname too it would require a
special conjoint implementation anyway.

Change-Id: I20919a49b123a6a49582d9cfacf1fd167cb44776
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/41394
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>

src/base/hostinfo.cc

@@ -28,8 +28,6 @@
 
 #include "base/hostinfo.hh"
 
-#include <unistd.h>
-
 #ifdef __APPLE__
 #include <mach/mach_init.h>
 #include <mach/shared_region.h>
@@ -41,22 +39,6 @@
 #include "base/logging.hh"
 #include "base/str.hh"
 
-std::string
-__get_hostname()
-{
-    char host[256];
-    if (gethostname(host, sizeof host) == -1)
-        warn("could not get host name!");
-    return host;
-}
-
-std::string &
-hostname()
-{
-    static std::string hostname = __get_hostname();
-    return hostname;
-}
-
 #ifndef __APPLE__
 uint64_t
 procInfo(const char *filename, const char *target)

src/base/hostinfo.hh

@@ -30,14 +30,6 @@
 #define __HOSTINFO_HH__
 
 #include <cstdint>
-#include <string>
-
-/**
- * Get the host name for the current machine.
- *
- * @return The machine's host name.
- */
-std::string &hostname();
 
 /**
  * Determine the simulator process' total virtual memory usage.