fix comment

R=r
DELTA=1  (0 added, 1 deleted, 0 changed)
OCL=28576
CL=28576

src/lib/os/proc.go

@@ -14,7 +14,6 @@ var Envs []string;	// provided by runtime
 
 // Exit causes the current program to exit with the given status code.
 // Conventionally, code zero indicates success, non-zero an error.
-// returning exit status n.
 func Exit(code int) {
 	syscall.Syscall(syscall.SYS_EXIT, int64(code), 0, 0)
 }