_content/doc/go1.27: remove unnecessary TODOs

CL 773822, CL 751920, CL 754400, CL 743341, and CL 756220 just
mention old proposals.

CL 752620 is doc-only change.

CL 749980 is a revert that also applied to Go 1.26, so nothing is
changed from Go 1.26.

Change-Id: I733c716df99331bc3d99102d069b4e50e26cbfc2
Reviewed-on: https://go-review.googlesource.com/c/website/+/787600
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
diff --git a/_content/doc/go1.27.md b/_content/doc/go1.27.md
index 8088744..8d2b15e 100644
--- a/_content/doc/go1.27.md
+++ b/_content/doc/go1.27.md
@@ -456,31 +456,6 @@
 - `cmd/doc: add example support`
 - `cmd/go: add example support to go doc output`
 
-### TODO: accepted proposal [/issue/41184](/issue/41184) (from [/cl/773822](/cl/773822))
-
-- `cmd/go: continue conversion to bug-resistant //go:build constraints`
-- `cmd/dist: use go/build/constraint to parse build constraints`
-
-### TODO: accepted proposal [/issue/44143](/issue/44143) (from [/cl/752620](/cl/752620))
-
-- `all: document uses of context.Background by APIs`
-- `log/slog: document context.Background use in non-Context methods`
-
-### TODO: accepted proposal [/issue/50603](/issue/50603) (from [/cl/751920](/cl/751920))
-
-- ``cmd/go: stamp the pseudo-version in builds generated by `go build` ``
-- `extension/src/language: update developer version detection logic`
-
-### TODO: accepted proposal [/issue/60641](/issue/60641) (from [/cl/754400](/cl/754400))
-
-- `runtime: enforce standard descriptors are open on initialization`
-- `runtime: std FDs are always opened, not only when AT_SECURE is set`
-
-### TODO: accepted proposal [/issue/62047](/issue/62047) (from [/cl/743341](/cl/743341))
-
-- `cmd: drop support for GOROOT_FINAL`
-- `internal/relui: leave out GOROOT_FINAL when building distpacks`
-
 ### TODO: accepted proposal [/issue/62728](/issue/62728) (from [/cl/601535](/cl/601535), [/cl/628615](/cl/628615), [/cl/751940](/cl/751940))
 
 - `testing: annotate output text type`
@@ -515,11 +490,6 @@
 - `encoding/json: clarify that v1 Marshal calls MarshalerTo methods`
 - `encoding/json/internal/jsontest: rename testdata to _embed`
 
-### TODO: accepted proposal [/issue/71867](/issue/71867) (from [/cl/756220](/cl/756220))
-
-- `cmd/go, cmd/distpack: build and run tools that are not necessary for builds as needed and don't include in binary distribution`
-- `cmd/go: specify full path to go command when running go tool covdata`
-
 ### TODO: accepted proposal [/issue/74609](/issue/74609) (from [/cl/774620](/cl/774620), [/cl/774621](/cl/774621), [/cl/775621](/cl/775621))
 
 - `runtime/pprof,runtime: new goroutine leak profile`
@@ -540,7 +510,3 @@
 - `crypto/tls: remove tls3des GODEBUG setting`
 - `crypto/tls: remove the tls10server GODEBUG setting`
 - `crypto/tls: remove the x509keypairleaf GODEBUG setting`
-
-### TODO: accepted proposal [/issue/77653](/issue/77653) (from [/cl/749980](/cl/749980))
-- ``cmd/go: change `go mod init` default go directive back to 1.N``
-- `cmd/go: revert update default go directive in mod or work init`