10495 libc should know how many FPU exceptions there are

@@ -60,12 +60,10 @@
 #if defined(__STDC__) && !defined(_FILEDEFED)
 #define _FILEDEFED
 typedef __FILE FILE;
 #endif
 
-#define N_IEEE_EXCEPTION 5      /* Number of floating-point exceptions. */
-
 typedef int sigfpe_code_type;   /* Type of SIGFPE code. */
 
 typedef void (*sigfpe_handler_type)();  /* Pointer to exception handler */
 
 #define SIGFPE_DEFAULT (void (*)())0    /* default exception handling */