cpu,process: remove commented-out code

Found using https://go-critic.github.io/overview#commentedOutCode-ref

cpu/cpu_linux.go

@@ -212,7 +212,6 @@ func parseStatLine(line string) (*TimesStat, error) {
 	}
 
 	if strings.HasPrefix(fields[0], "cpu") == false {
-		//		return CPUTimesStat{}, e
 		return nil, errors.New("not contain cpu")
 	}
 

process/process_test.go

@@ -168,12 +168,6 @@ func Test_Process_Terminal(t *testing.T) {
 	if err != nil {
 		t.Errorf("geting terminal error %v", err)
 	}
-
-	/*
-		if v == "" {
-			t.Errorf("could not get terminal %v", v)
-		}
-	*/
 }
 
 func Test_Process_IOCounters(t *testing.T) {