remove sqrt workaround

Author: frasercrmck

libclc/clc/lib/generic/math/clc_sqrt.inc

@@ -20,18 +20,7 @@
  * THE SOFTWARE.
  */
 
-#if __CLC_FPSIZE == 64
-#define __CLC_NAN DBL_NAN
-#elif __CLC_FPSIZE == 32
-#define __CLC_NAN FLT_NAN
-#elif __CLC_FPSIZE == 16
-#define __CLC_NAN HALF_NAN
-#endif
-
 __attribute__((weak)) _CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE
 __clc_sqrt(__CLC_GENTYPE val) {
-  return val < __CLC_FP_LIT(0.0) ? (__CLC_GENTYPE)__CLC_NAN
-                                 : __builtin_elementwise_sqrt(val);
+  return __builtin_elementwise_sqrt(val);
 }
-
-#undef __CLC_NAN