remove the entire file buffer modification which was never come in effect

Take over this task to the OS which will handle this properly.

src/frontend/runcoms.c

@@ -45,8 +45,6 @@ extern struct dbcomm *dbs;
 
 FILE *rawfileFp;
 bool rawfileBinary;
-#define RAWBUF_SIZE 32768
-char rawfileBuf[RAWBUF_SIZE];
 /*To tell resume the rawfile name saj*/
 char *last_used_rawfile = NULL;
 /*end saj */
@@ -286,7 +284,6 @@ dosim(
             ft_setflag = FALSE;
             return 1;
         }
-        setvbuf(rawfileFp, rawfileBuf, _IOFBF, RAWBUF_SIZE);
 #endif /* __MINGW32__ */
         rawfileBinary = !ascii;
     } else {

src/frontend/runcoms2.c

@@ -27,8 +27,6 @@ Author: 1985 Wayne A. Christopher, U. C. Berkeley CAD Group
 
 #include "ngspice/inpdefs.h"
 
-#define RAWBUF_SIZE 32768
-extern char rawfileBuf[RAWBUF_SIZE];
 extern void line_free_x(struct card *deck, bool recurse);
 extern INPmodel *modtab;
 
@@ -114,14 +112,12 @@ com_resume(wordlist *wl)
                 ft_setflag = FALSE;
                 return;
             }
-            setvbuf(rawfileFp, rawfileBuf, _IOFBF, RAWBUF_SIZE);
         } else if (!ascii) {
             if ((rawfileFp = fopen(last_used_rawfile, "ab")) == NULL) {
                 perror(last_used_rawfile);
                 ft_setflag = FALSE;
                 return;
             }
-            setvbuf(rawfileFp, rawfileBuf, _IOFBF, RAWBUF_SIZE);
         }
         /*---------------------------------------------------------------------------*/
 #else
@@ -130,7 +126,6 @@ com_resume(wordlist *wl)
             ft_setflag = FALSE;
             return;
         }
-        setvbuf(rawfileFp, rawfileBuf, _IOFBF, RAWBUF_SIZE);
 #endif
         rawfileBinary = !ascii;
     } else {