gdb: remove unused argument from gdb_init

The argument to gdb_init is not used, remove it.

There should be no user visible changes after this commit.

gdb/ChangeLog:

	* main.c (captured_main_1): Don't pass argument to gdb_init.
	* top.c (gdb_init): Remove unused argument, and add header
	comment.
	* top.h (gdb_init): Remove argument.

gdb/ChangeLog

@@ -1,3 +1,10 @@
+2021-04-28  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* main.c (captured_main_1): Don't pass argument to gdb_init.
+	* top.c (gdb_init): Remove unused argument, and add header
+	comment.
+	* top.h (gdb_init): Remove argument.
+
 2021-04-27  Luis Machado  <luis.machado@linaro.org>
 
 	* psymtab.c (psymbol_functions::dump): Output newline.

gdb/main.c

@@ -1039,7 +1039,7 @@ captured_main_1 (struct captured_main_args *context)
   gdb::alternate_signal_stack signal_stack;
 
   /* Initialize all files.  */
-  gdb_init (gdb_program_name);
+  gdb_init ();
 
   /* Process early init files and early init options from the command line.  */
   if (!inhibit_gdbinit)

gdb/top.c

@@ -2360,8 +2360,10 @@ The second argument is the terminal the UI runs on."), &cmdlist);
   set_cmd_completer (c, interpreter_completer);
 }
 
+/* See top.h.  */
+
 void
-gdb_init (char *argv0)
+gdb_init ()
 {
   saved_command_line = xstrdup ("");
   previous_saved_command_line = xstrdup ("");

gdb/top.h

@@ -271,7 +271,7 @@ extern void set_prompt (const char *s);
 extern int gdb_in_secondary_prompt_p (struct ui *ui);
 
 /* Perform _initialize initialization.  */
-extern void gdb_init (char *);
+extern void gdb_init ();
 
 /* For use by event-top.c.  */
 /* Variables from top.c.  */