all: switch to context package in std lib, remove obsolete +build lines

Done with:

go fix ./...

Using go1.21.0.

Change-Id: I1a672e18186a4af800cd3623f9cb34c81cddd298
Reviewed-on: https://go-review.googlesource.com/c/perf/+/525659
Reviewed-by: Dmitri Shuralyov <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>
Reviewed-by: Michael Knyszek <[email protected]>

Author: dmitshur

analysis/app/appengine.go

@@ -3,14 +3,13 @@
 // license that can be found in the LICENSE file.
 
 //go:build appengine
-// +build appengine
 
 package app
 
 import (
+	"context"
 	"net/http"
 
-	"golang.org/x/net/context"
 	"google.golang.org/appengine"
 	"google.golang.org/appengine/log"
 )

analysis/app/compare.go

@@ -6,6 +6,7 @@ package app
 
 import (
 	"bytes"
+	"context"
 	"errors"
 	"fmt"
 	"html/template"
@@ -17,7 +18,6 @@ import (
 	"strings"
 	"unicode"
 
-	"golang.org/x/net/context"
 	"golang.org/x/perf/benchstat"
 	"golang.org/x/perf/storage/benchfmt"
 	"golang.org/x/perf/storage/query"

analysis/app/compare_test.go

@@ -5,14 +5,14 @@
 package app
 
 import (
+	"context"
 	"fmt"
 	"net/http"
 	"net/http/httptest"
 	"reflect"
 	"strings"
 	"testing"
 
-	"golang.org/x/net/context"
 	"golang.org/x/perf/storage"
 	"golang.org/x/perf/storage/benchfmt"
 )

analysis/app/local.go

@@ -3,15 +3,13 @@
 // license that can be found in the LICENSE file.
 
 //go:build !appengine
-// +build !appengine
 
 package app
 
 import (
+	"context"
 	"log"
 	"net/http"
-
-	"golang.org/x/net/context"
 )
 
 // requestContext returns the Context object for a given request.

analysis/app/trend.go

@@ -8,6 +8,7 @@ package app
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 	"fmt"
 	"html/template"
@@ -22,7 +23,6 @@ import (
 	"github.com/aclements/go-gg/generic/slice"
 	"github.com/aclements/go-gg/ggstat"
 	"github.com/aclements/go-gg/table"
-	"golang.org/x/net/context"
 	"golang.org/x/perf/storage"
 )
 

analysis/appengine/app.go

@@ -6,12 +6,12 @@
 package main
 
 import (
+	"context"
 	"log"
 	"net/http"
 	"os"
 	"time"
 
-	"golang.org/x/net/context"
 	"golang.org/x/perf/analysis/app"
 	"golang.org/x/perf/storage"
 	"google.golang.org/appengine"

benchmath/mktables.go

@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
-// +build ignore
 
 // Mktables pre-computes statistical tables.
 package main

storage/app/appengine.go

@@ -3,14 +3,13 @@
 // license that can be found in the LICENSE file.
 
 //go:build appengine
-// +build appengine
 
 package app
 
 import (
+	"context"
 	"net/http"
 
-	"golang.org/x/net/context"
 	"google.golang.org/appengine"
 	"google.golang.org/appengine/log"
 )

storage/app/local.go

@@ -3,15 +3,13 @@
 // license that can be found in the LICENSE file.
 
 //go:build !appengine
-// +build !appengine
 
 package app
 
 import (
+	"context"
 	"log"
 	"net/http"
-
-	"golang.org/x/net/context"
 )
 
 // requestContext returns the Context object for a given request.

storage/app/query_test.go

@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build cgo
-// +build cgo
 
 package app
 

storage/app/upload.go

@@ -5,6 +5,7 @@
 package app
 
 import (
+	"context"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -17,7 +18,6 @@ import (
 	"strings"
 	"time"
 
-	"golang.org/x/net/context"
 	"golang.org/x/perf/storage/benchfmt"
 	"golang.org/x/perf/storage/db"
 )

storage/app/upload_test.go

@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build cgo
-// +build cgo
 
 package app
 

storage/appengine/app.go

@@ -6,6 +6,7 @@
 package main
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"log"
@@ -15,7 +16,6 @@ import (
 	"time"
 
 	_ "github.com/go-sql-driver/mysql"
-	"golang.org/x/net/context"
 	"golang.org/x/perf/storage/app"
 	"golang.org/x/perf/storage/db"
 	"golang.org/x/perf/storage/fs/gcs"

storage/client.go

@@ -8,14 +8,14 @@
 package storage
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"io"
 	"mime/multipart"
 	"net/http"
 	"net/url"
 
-	"golang.org/x/net/context"
 	"golang.org/x/net/context/ctxhttp"
 	"golang.org/x/perf/storage/benchfmt"
 )

storage/client_test.go

@@ -6,14 +6,14 @@ package storage
 
 import (
 	"bytes"
+	"context"
 	"fmt"
 	"io"
 	"net/http"
 	"net/http/httptest"
 	"reflect"
 	"testing"
 
-	"golang.org/x/net/context"
 	"golang.org/x/perf/internal/diff"
 	"golang.org/x/perf/storage/benchfmt"
 )

storage/db/db.go

@@ -8,6 +8,7 @@ package db
 
 import (
 	"bytes"
+	"context"
 	"database/sql"
 	"fmt"
 	"io"
@@ -18,7 +19,6 @@ import (
 	"text/template"
 	"time"
 
-	"golang.org/x/net/context"
 	"golang.org/x/perf/storage"
 	"golang.org/x/perf/storage/benchfmt"
 	"golang.org/x/perf/storage/query"

storage/db/db_test.go

@@ -3,12 +3,12 @@
 // license that can be found in the LICENSE file.
 
 //go:build cgo
-// +build cgo
 
 package db_test
 
 import (
 	"bytes"
+	"context"
 	"fmt"
 	"reflect"
 	"sort"
@@ -17,7 +17,6 @@ import (
 	"testing"
 	"time"
 
-	"golang.org/x/net/context"
 	"golang.org/x/perf/internal/diff"
 	"golang.org/x/perf/storage/benchfmt"
 	. "golang.org/x/perf/storage/db"

storage/db/dbtest/cloud.go

@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build cloud && !plan9
-// +build cloud,!plan9
 
 package dbtest
 

storage/db/dbtest/dbtest.go

@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build cgo
-// +build cgo
 
 package dbtest
 

storage/db/dbtest/nocloud.go

@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build !cloud && !plan9
-// +build !cloud,!plan9
 
 package dbtest
 

storage/db/sqlite3/sqlite3.go

@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build cgo
-// +build cgo
 
 // Package sqlite3 provides the sqlite3 driver for
 // x/perf/storage/db. It must be imported instead of go-sqlite3 to

storage/fs/fs.go

@@ -7,12 +7,11 @@
 package fs
 
 import (
+	"context"
 	"errors"
 	"io"
 	"sort"
 	"sync"
-
-	"golang.org/x/net/context"
 )
 
 // An FS stores uploaded benchmark data files.

storage/fs/gcs/gcs.go

@@ -6,8 +6,9 @@
 package gcs
 
 import (
+	"context"
+
 	"cloud.google.com/go/storage"
-	"golang.org/x/net/context"
 	"golang.org/x/perf/storage/fs"
 )
 

storage/fs/local/local.go

@@ -8,10 +8,10 @@
 package local
 
 import (
+	"context"
 	"os"
 	"path/filepath"
 
-	"golang.org/x/net/context"
 	"golang.org/x/perf/storage/fs"
 )
 

storage/localperfdata/app.go

@@ -3,7 +3,6 @@
 // license that can be found in the LICENSE file.
 
 //go:build cgo
-// +build cgo
 
 // Localperfdata runs an HTTP server for benchmark storage.
 //