remove redundant getopt.h declarations

src/fluidsynth.c

@@ -34,6 +34,7 @@
 
 #if defined(HAVE_GETOPT_H)
 #include <getopt.h>
+#define GETOPT_SUPPORT 1
 #endif
 
 #include "fluidsynth.h"
@@ -58,15 +59,6 @@ void print_welcome(void);
 fluid_cmd_handler_t* cmd_handler = NULL;
 int option_help = 0;		/* set to 1 if "-o help" is specified */
 
-/*
- * support for the getopt function
- */
-#if defined(HAVE_GETOPT_H)
-#define GETOPT_SUPPORT 1
-int getopt(int argc, char * const argv[], const char *optstring);
-extern char *optarg;
-extern int optind, opterr, optopt;
-#endif
 
 /* Process a command line option -o setting=value, for example: -o synth.polyhony=16 */
 void process_o_cmd_line_option(fluid_settings_t* settings, char* optarg)