sbbs_t::nodefile_fp and node_ext_fp aren't used for anything in sbbs v3

Get rid of this noise.

src/sbbs3/exec.cpp

@@ -372,12 +372,6 @@ int32_t * sbbs_t::getintvar(csi_t *bin, uint32_t name)
 		case 0xe51c1956:
 			sysvar_l[sysvar_li] = (ulong)logfile_fp;
 			break;
-		case 0x5a22d4bd:
-			sysvar_l[sysvar_li] = (ulong)nodefile_fp;
-			break;
-		case 0x3a37c26b:
-			sysvar_l[sysvar_li] = (ulong)node_ext_fp;
-			break;
 
 		case 0xeb6c9c73:
 			sysvar_l[sysvar_li] = errorlevel;

src/sbbs3/sbbs.h

@@ -581,9 +581,7 @@ public:
 	char	rlogin_pass[LEN_PASS+1]{};
 	char	rlogin_term[TELNET_TERM_MAXLEN+1]{};	/* RLogin passed terminal type/speed (e.g. "xterm/57600") */
 
-	FILE	*nodefile_fp = nullptr,
-			*node_ext_fp = nullptr,
-			*logfile_fp = nullptr;
+	FILE	*logfile_fp = nullptr;
 
 	int 	nodefile = -1;	/* File handle for node.dab */
 	pthread_mutex_t	nodefile_mutex;