Simplify fpconv_init by removing thread handling

Author: shdwmtr

fpconv.h

@@ -7,20 +7,10 @@
 # define FPCONV_G_FMT_BUFSIZE   32
 
 #ifdef USE_INTERNAL_FPCONV
-#ifdef MULTIPLE_THREADS
-#include "dtoa_config.h"
-#include <unistd.h>
-static inline void fpconv_init()
-{
-    // Add one to try and avoid core id multiplier alignment
-    set_max_dtoa_threads((sysconf(_SC_NPROCESSORS_CONF) + 1) * 3);
-}
-#else
 static inline void fpconv_init()
 {
     /* Do nothing - not required */
 }
-#endif
 #else
 extern void fpconv_init(void);
 #endif