Remove unwanted dependencies (#913)

Co-authored-by: Azeem Shaikh <azeems@google.com>

go.mod

@@ -16,7 +16,6 @@ require (
 	github.com/h2non/filetype v1.1.1
 	github.com/jszwec/csvutil v1.5.0
 	github.com/moby/buildkit v0.8.3
-	github.com/naveensrinivasan/httpcache v1.2.2
 	github.com/olekukonko/tablewriter v0.0.5
 	github.com/onsi/ginkgo v1.16.4
 	github.com/onsi/gomega v1.16.0

go.sum

@@ -288,7 +288,6 @@ github.com/bombsimon/wsl/v3 v3.1.0/go.mod h1:st10JtZYLE4D5sC7b8xV4zTKZwAQjCH/Hy2
 github.com/bombsimon/wsl/v3 v3.3.0 h1:Mka/+kRLoQJq7g2rggtgQsjuI/K5Efd87WX96EWFxjM=
 github.com/bombsimon/wsl/v3 v3.3.0/go.mod h1:st10JtZYLE4D5sC7b8xV4zTKZwAQjCH/Hy2Pm1FNZIc=
 github.com/bradfitz/go-smtpd v0.0.0-20170404230938-deb6d6237625/go.mod h1:HYsPBTaaSFSlLx/70C2HPIMNZpVV8+vt/A+FMnYP11g=
-github.com/bradfitz/gomemcache v0.0.0-20190913173617-a41fca850d0b/go.mod h1:H0wQNHz2YrLsuXOZozoeDmnHXkNCRmMW0gwFWDfEZDA=
 github.com/bradleyfalzon/ghinstallation v1.1.1 h1:pmBXkxgM1WeF8QYvDLT5kuQiHMcmf+X015GI0KM/E3I=
 github.com/bradleyfalzon/ghinstallation v1.1.1/go.mod h1:vyCmHTciHx/uuyN82Zc3rXN3X2KTK8nUTCrTMwAhcug=
 github.com/bshuster-repo/logrus-logstash-hook v0.4.1/go.mod h1:zsTqEiSzDgAa/8GZR7E1qaXrhYNDKBYy5/dWPTIflbk=
@@ -721,7 +720,6 @@ github.com/golangci/revgrep v0.0.0-20210208091834-cd28932614b5 h1:c9Mqqrm/Clj5bi
 github.com/golangci/revgrep v0.0.0-20210208091834-cd28932614b5/go.mod h1:LK+zW4MpyytAWQRz0M4xnzEk50lSvqDQKfx304apFkY=
 github.com/golangci/unconvert v0.0.0-20180507085042-28b1c447d1f4 h1:zwtduBRr5SSWhqsYNgcuWO2kFlpdOZbP0+yRjmvPGys=
 github.com/golangci/unconvert v0.0.0-20180507085042-28b1c447d1f4/go.mod h1:Izgrg8RkN3rCIMLGE9CyYmU9pY2Jer6DgANEnZ/L/cQ=
-github.com/gomodule/redigo v1.8.4/go.mod h1:P9dn9mFrCBvWhGE1wpxx6fgq7BAeLBk+UUUzlpkBYO0=
 github.com/google/addlicense v0.0.0-20210809195240-d43bb61fdfda h1:tyzGZYxUAj2Ue7lswp0ab21jxwHT2SaC2J5k5w6B6OY=
 github.com/google/addlicense v0.0.0-20210809195240-d43bb61fdfda/go.mod h1:Sm/DHu7Jk+T5miFHHehdIjbi4M5+dJDRS3Cq0rncIxA=
 github.com/google/btree v0.0.0-20180124185431-e89373fe6b4a/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
@@ -1146,8 +1144,6 @@ github.com/mwitkow/go-proto-validators v0.2.0/go.mod h1:ZfA1hW+UH/2ZHOWvQ3HnQaU0
 github.com/mxk/go-flowrate v0.0.0-20140419014527-cca7078d478f/go.mod h1:ZdcZmHo+o7JKHSa8/e818NopupXU1YMK5fe1lsApnBw=
 github.com/nakabonne/nestif v0.3.0 h1:+yOViDGhg8ygGrmII72nV9B/zGxY188TYpfolntsaPw=
 github.com/nakabonne/nestif v0.3.0/go.mod h1:dI314BppzXjJ4HsCnbo7XzrJHPszZsjnk5wEBSYHI2c=
-github.com/naveensrinivasan/httpcache v1.2.2 h1:1mvisGk8KNWdixG7FZ+MGEGdZFxo2e4u82Ke56RqUos=
-github.com/naveensrinivasan/httpcache v1.2.2/go.mod h1:gpEVVjcTYZA3F1tqYkLqbNvZuf380rhUDaV5OZpyQ88=
 github.com/nbutton23/zxcvbn-go v0.0.0-20180912185939-ae427f1e4c1d/go.mod h1:o96djdrsSGy3AWPyBgZMAGfxZNfgntdJG+11KU4QvbU=
 github.com/nbutton23/zxcvbn-go v0.0.0-20210217022336-fa2cb2858354 h1:4kuARK6Y6FxaNu/BnU2OAaLF86eTVhP2hjTB6iMvItA=
 github.com/nbutton23/zxcvbn-go v0.0.0-20210217022336-fa2cb2858354/go.mod h1:KSVJerMDfblTH7p5MZaTt+8zaT2iEk3AkVb9PQdZuE8=
@@ -1434,7 +1430,6 @@ github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69
 github.com/syndtr/gocapability v0.0.0-20170704070218-db04d3cc01c8/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
 github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
 github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
-github.com/syndtr/goleveldb v1.0.0/go.mod h1:ZVVdQEZoIme9iO1Ch2Jdy24qqXrMMOU6lpPAyBWyWuQ=
 github.com/tarm/serial v0.0.0-20180830185346-98f6abe2eb07/go.mod h1:kDXzergiv9cbyO7IOYJZWg1U88JhDg3PB6klq9Hg2pA=
 github.com/tchap/go-patricia v2.2.6+incompatible/go.mod h1:bmLyhP68RS6kStMGxByiQ23RP/odRBOTVjwp2cDyi6I=
 github.com/tdakkota/asciicheck v0.0.0-20200416190851-d7f85be797a2/go.mod h1:yHp0ai0Z9gUljN3o0xMhYJnH/IcvkdTBOX2fmJ93JEM=

roundtripper/census.go

@@ -18,7 +18,6 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/naveensrinivasan/httpcache"
 	"go.opencensus.io/plugin/ochttp"
 	opencensusstats "go.opencensus.io/stats"
 	"go.opencensus.io/tag"
@@ -27,6 +26,8 @@ import (
 	"github.com/ossf/scorecard/v2/stats"
 )
 
+const fromCacheHeader = "X-From-Cache"
+
 // MakeCensusTransport wraps input Roundtripper with monitoring logic.
 func MakeCensusTransport(innerTransport http.RoundTripper) http.RoundTripper {
 	return &ochttp.Transport{
@@ -55,8 +56,8 @@ func (ct *censusTransport) RoundTrip(r *http.Request) (*http.Response, error) {
 		//nolint:wrapcheck
 		return nil, sce.Create(sce.ErrScorecardInternal, fmt.Sprintf("innerTransport.RoundTrip: %v", err))
 	}
-	if resp.Header.Get(httpcache.XFromCache) != "" {
-		ctx, err = tag.New(ctx, tag.Upsert(stats.RequestTag, httpcache.XFromCache))
+	if resp.Header.Get(fromCacheHeader) != "" {
+		ctx, err = tag.New(ctx, tag.Upsert(stats.RequestTag, fromCacheHeader))
 		if err != nil {
 			//nolint:wrapcheck
 			return nil, sce.Create(sce.ErrScorecardInternal, fmt.Sprintf("tag.New: %v", err))