5261 libm should stop using synonyms.h

*** 31,45 ****
  #define restrict _Restrict
  #else
  #define restrict
  #endif
  
- #include "libm_synonyms.h"
  #include "libm_inlines.h"
  
- #define sqrtf __sqrtf
- 
  extern float sqrtf(float);
  
  void
  __vsqrtf(int n, float * restrict x, int stridex, float * restrict y, int stridey)
  {
--- 31,42 ----
*** 48,53 ****
                  *y = sqrtf(*x);
                  x += stridex;
                  y += stridey;
          }
  }
- 
--- 45,49 ----