third_party/go: fix `go mod tidy`
This makes our root repository somewhat more gomod-compliant, to the
point where we can run `go mod tidy` to manage dependencies.
The generated placeholder files turn their parent paths into enough of a
Go package that the go tooling is appeased, but they are ignored by
Gazelle.
Ideally, we will generate these placeholders automatically before
running `go mod tidy` and gitignore them, but this will do as a first
pass.
We also remove some unused dependencies which got caught by `go mod
tidy`.
Change-Id: I81e7e92a45f22c8ef9c92207f67a5bd6cc773da5
Reviewed-on: https://review.monogon.dev/c/monogon/+/652
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
Reviewed-by: Leopold Schabel <leo@nexantic.com>
diff --git a/metropolis/node/build/mkucode/spec/gomod-generated-placeholder.go b/metropolis/node/build/mkucode/spec/gomod-generated-placeholder.go
new file mode 100644
index 0000000..f09cd57
--- /dev/null
+++ b/metropolis/node/build/mkucode/spec/gomod-generated-placeholder.go
@@ -0,0 +1 @@
+package spec
diff --git a/metropolis/node/core/curator/proto/api/gomod-generated-placeholder.go b/metropolis/node/core/curator/proto/api/gomod-generated-placeholder.go
new file mode 100644
index 0000000..778f64e
--- /dev/null
+++ b/metropolis/node/core/curator/proto/api/gomod-generated-placeholder.go
@@ -0,0 +1 @@
+package api
diff --git a/metropolis/node/core/curator/proto/private/gomod-generated-placeholder.go b/metropolis/node/core/curator/proto/private/gomod-generated-placeholder.go
new file mode 100644
index 0000000..735e4dc
--- /dev/null
+++ b/metropolis/node/core/curator/proto/private/gomod-generated-placeholder.go
@@ -0,0 +1 @@
+package private
diff --git a/metropolis/pkg/tpm/proto/gomod-generated-placeholder.go b/metropolis/pkg/tpm/proto/gomod-generated-placeholder.go
new file mode 100644
index 0000000..92256db
--- /dev/null
+++ b/metropolis/pkg/tpm/proto/gomod-generated-placeholder.go
@@ -0,0 +1 @@
+package proto
diff --git a/metropolis/proto/api/gomod-generated-placeholder.go b/metropolis/proto/api/gomod-generated-placeholder.go
new file mode 100644
index 0000000..778f64e
--- /dev/null
+++ b/metropolis/proto/api/gomod-generated-placeholder.go
@@ -0,0 +1 @@
+package api
diff --git a/metropolis/proto/common/gomod-generated-placeholder.go b/metropolis/proto/common/gomod-generated-placeholder.go
new file mode 100644
index 0000000..805d0c7
--- /dev/null
+++ b/metropolis/proto/common/gomod-generated-placeholder.go
@@ -0,0 +1 @@
+package common
diff --git a/metropolis/proto/ext/gomod-generated-placeholder.go b/metropolis/proto/ext/gomod-generated-placeholder.go
new file mode 100644
index 0000000..b39f0bb
--- /dev/null
+++ b/metropolis/proto/ext/gomod-generated-placeholder.go
@@ -0,0 +1 @@
+package ext
diff --git a/metropolis/proto/private/gomod-generated-placeholder.go b/metropolis/proto/private/gomod-generated-placeholder.go
new file mode 100644
index 0000000..735e4dc
--- /dev/null
+++ b/metropolis/proto/private/gomod-generated-placeholder.go
@@ -0,0 +1 @@
+package private