fmt: clean up some errors found by vet

Includes deleting some unused items.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/12305043

src/pkg/fmt/fmt_test.go

@@ -906,7 +906,7 @@ type Recur struct {
 	failed *bool
 }
 
-func (r Recur) String() string {
+func (r *Recur) String() string {
 	if recurCount++; recurCount > 10 {
 		*r.failed = true
 		return "FAIL"
@@ -919,13 +919,13 @@ func (r Recur) String() string {
 
 func TestBadVerbRecursion(t *testing.T) {
 	failed := false
-	r := Recur{3, &failed}
+	r := &Recur{3, &failed}
 	Sprintf("recur@%p value: %d\n", &r, r.i)
 	if failed {
 		t.Error("fail with pointer")
 	}
 	failed = false
-	r = Recur{4, &failed}
+	r = &Recur{4, &failed}
 	Sprintf("recur@%p, value: %d\n", r, r.i)
 	if failed {
 		t.Error("fail with value")

src/pkg/fmt/format.go

@@ -24,8 +24,6 @@ const (
 var padZeroBytes = make([]byte, nByte)
 var padSpaceBytes = make([]byte, nByte)
 
-var newline = []byte{'\n'}
-
 func init() {
 	for i := 0; i < nByte; i++ {
 		padZeroBytes[i] = '0'

src/pkg/fmt/print.go

@@ -641,8 +641,6 @@ func (p *pp) fmtPointer(value reflect.Value, verb rune, goSyntax bool) {
 
 var (
 	intBits     = reflect.TypeOf(0).Bits()
-	floatBits   = reflect.TypeOf(0.0).Bits()
-	complexBits = reflect.TypeOf(1i).Bits()
 	uintptrBits = reflect.TypeOf(uintptr(0)).Bits()
 )
 

src/pkg/fmt/scan.go

@@ -479,11 +479,6 @@ func (s *ss) token(skipSpace bool, f func(rune) bool) []byte {
 	return s.buf
 }
 
-// typeError indicates that the type of the operand did not match the format
-func (s *ss) typeError(arg interface{}, expected string) {
-	s.errorString("expected argument of type pointer to " + expected + "; found " + reflect.TypeOf(arg).String())
-}
-
 var complexError = errors.New("syntax error scanning complex number")
 var boolError = errors.New("syntax error scanning boolean")
 

src/pkg/fmt/scan_test.go

@@ -54,7 +54,6 @@ var (
 	float32Val           float32
 	float64Val           float64
 	stringVal            string
-	stringVal1           string
 	bytesVal             []byte
 	runeVal              rune
 	complex64Val         complex64