std: remove unused bits of code all over the place

Some were never used, and some haven't been used for years.

One exception is net/http's readerAndCloser, which was only used in a
test. Move it to a test file.

While at it, remove a check in regexp that could never fire; the field
is an uint32, so it can never be negative.

Change-Id: Ia2200f6afa106bae4034045ea8233b452f38747b
Reviewed-on: https://go-review.googlesource.com/c/go/+/192621
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

1 files changed, 0 insertions, 9 deletions

diff --git a/src/reflect/type.go b/src/reflect/type.go
index 4afe634bbf..b3df452ee8 100644
--- a/src/reflect/type.go
+++ b/src/reflect/type.go
@@ -527,11 +527,6 @@ func (n name) pkgPath() string {
 	return pkgPathName.name()
 }
 
-// round n up to a multiple of a.  a must be a power of 2.
-func round(n, a uintptr) uintptr {
-	return (n + a - 1) &^ (a - 1)
-}
-
 func newName(n, tag string, exported bool) name {
 	if len(n) > 1<<16-1 {
 		panic("reflect.nameFrom: name too long: " + n)
@@ -867,10 +862,6 @@ func (t *rtype) PkgPath() string {
 	return t.nameOff(ut.pkgPath).name()
 }
 
-func hasPrefix(s, prefix string) bool {
-	return len(s) >= len(prefix) && s[:len(prefix)] == prefix
-}
-
 func (t *rtype) hasName() bool {
 	return t.tflag&tflagNamed != 0
 }