remove SetHeadersNonCanonical and SetHeaders of Transport(use Client …

…to set)

transport.go

@@ -214,54 +214,6 @@ func (t *Transport) WrapRoundTrip(wrappers ...HttpRoundTripWrapper) *Transport {
 	return t
 }
 
-// SetHeaders set headers for all requests, if the same header exists at
-// the request-level, the request-level header takes precedence.
-func (t *Transport) SetHeaders(hdrs http.Header) *Transport {
-	if len(hdrs) == 0 {
-		return t
-	}
-	t.WrapRoundTripFunc(func(rt http.RoundTripper) HttpRoundTripFunc {
-		return func(req *http.Request) (resp *http.Response, err error) {
-			if req.Header == nil {
-				req.Header = make(http.Header)
-			}
-			for k, v := range hdrs {
-				if len(v) == 0 {
-					continue
-				}
-				kk := textproto.CanonicalMIMEHeaderKey(k)
-				if len(req.Header[kk]) == 0 {
-					req.Header[kk] = v
-				}
-			}
-			return rt.RoundTrip(req)
-		}
-	})
-	return t
-}
-
-// SetHeadersNonCanonical set non-canonical headers for all requests, if the
-// same header exists at the request-level, the request-level header takes precedence.
-func (t *Transport) SetHeadersNonCanonical(hdrs http.Header) *Transport {
-	if len(hdrs) == 0 {
-		return t
-	}
-	t.WrapRoundTripFunc(func(rt http.RoundTripper) HttpRoundTripFunc {
-		return func(req *http.Request) (resp *http.Response, err error) {
-			if req.Header == nil {
-				req.Header = make(http.Header)
-			}
-			for k, v := range hdrs {
-				if len(v) > 0 && len(req.Header[k]) == 0 {
-					req.Header[k] = v
-				}
-			}
-			return rt.RoundTrip(req)
-		}
-	})
-	return t
-}
-
 // SetHeaderOrder set the order of the http header (case-insensitive).
 // For example:
 //