encoding/xml, image/jpeg, image/png: use the builtin min function

src/encoding/xml/typeinfo.go

@@ -251,13 +251,6 @@ func lookupXMLName(typ reflect.Type) (xmlname *fieldInfo) {
 	return nil
 }
 
-func min(a, b int) int {
-	if a <= b {
-		return a
-	}
-	return b
-}
-
 // addFieldInfo adds finfo to tinfo.fields if there are no
 // conflicts, or if conflicts arise from previous fields that were
 // obtained from deeper embedded structures than finfo. In the latter

src/image/jpeg/writer.go

@@ -12,14 +12,6 @@ import (
 	"io"
 )
 
-// min returns the minimum of two integers.
-func min(x, y int) int {
-	if x < y {
-		return x
-	}
-	return y
-}
-
 // div returns a/b rounded to the nearest integer, instead of rounded to zero.
 func div(a, b int32) int32 {
 	if a >= 0 {

src/image/png/reader.go

@@ -136,13 +136,6 @@ type UnsupportedError string
 
 func (e UnsupportedError) Error() string { return "png: unsupported feature: " + string(e) }
 
-func min(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}
-
 func (d *decoder) parseIHDR(length uint32) error {
 	if length != 13 {
 		return FormatError("bad IHDR length")