Remove C comments

Author: wlmb

lib/PDL/Ops.pd

@@ -433,9 +433,6 @@ EOF
     Code => q{
         PDL_IF_GENTYPE_REAL(complex,$GENERIC()) tmp=$i();
         tmp=csqrt(tmp);
-        //if(creal(tmp)<0){
-        //     tmp = -tmp;
-        //}
         $o() = tmp;
     },
 );