Deprecate divviup-ts dap-draft-04 and -07 (#911)

Divvi Up is converging its deployments onto `draft-ietf-ppm-dap-09`, and
so we no longer need the `-04` and `-07` implementations. This commit
removes those branches from dependabot and updates the versions table in
README.md.

Part of divviup/janus-ops#1856

.github/dependabot.yml

@@ -16,43 +16,3 @@ updates:
     directory: "/"
     schedule:
       interval: "daily"
-
-  # Manage dependencies on the `release/dap-draft-04` branch
-  - package-ecosystem: "npm"
-    target-branch: "release/dap-draft-04"
-    directory: "/"
-    schedule:
-      interval: "daily"
-    groups:
-      eslint:
-        patterns:
-          - "*eslint*"
-      hpke-js:
-        patterns:
-          - "hpke-js"
-          - "@hpke/*"
-  - package-ecosystem: "github-actions"
-    target-branch: "release/dap-draft-04"
-    directory: "/"
-    schedule:
-      interval: "daily"
-
-  # Manage dependencies on the `release/dap-draft-07` branch
-  - package-ecosystem: "npm"
-    target-branch: "release/dap-draft-07"
-    directory: "/"
-    schedule:
-      interval: "daily"
-    groups:
-      eslint:
-        patterns:
-          - "*eslint*"
-      hpke-js:
-        patterns:
-          - "hpke-js"
-          - "@hpke/*"
-  - package-ecosystem: "github-actions"
-    target-branch: "release/dap-draft-07"
-    directory: "/"
-    schedule:
-      interval: "daily"

README.md

@@ -18,17 +18,17 @@ branch. Only supported release branches receive dependency updates and backports
 | ----------------------------------- | ----------------------------------- | --------------------------------- | -------------------------- | ------------------------------- |
 | N/A                                 | [`release-dap-draft-02`][branch-02] | [`draft-ietf-ppm-dap-02`][dap-02] | Yes                        | Unmaintained                    |
 | N/A                                 | [`release-dap-draft-03`][branch-03] | [`draft-ietf-ppm-dap-03`][dap-03] | Yes                        | Unmaintained as of May 22, 2023 |
-| [`@divviup/[email protected]`][npm-dap-0.1.0] | [`release-dap-draft-04`][branch-04] | [`draft-ietf-ppm-dap-04`][dap-04] | Yes                        | Supported                       |
-| [`@divviup/[email protected]`][npm-dap-0.7.0] | [`release-dap-draft-07`][branch-07] | [`draft-ietf-ppm-dap-07`][dap-07] | Yes                        | Supported                       |
+| [`@divviup/[email protected]`][npm-dap-0.1.0] | [`release-dap-draft-04`][branch-04] | [`draft-ietf-ppm-dap-04`][dap-04] | Yes                        | Unmaintained as of June 24, 2024 |
+| [`@divviup/[email protected]`][npm-dap-0.7.0] | [`release-dap-draft-07`][branch-07] | [`draft-ietf-ppm-dap-07`][dap-07] | Yes                        | Unmaintained as of June 24, 2024 |
 | [`@divviup/[email protected]`][npm-dap-0.9.0] | [`main`][main]                      | [`draft-ietf-ppm-dap-09`][dap-09] | Yes                        | Supported                       |
 
 ### VDAF and Prio3
 
 | VDAF Package                          | Prio3 Package                           | Git branch                          | Protocol version                     | Conforms to specification? | Status                          |
 | ------------------------------------- | --------------------------------------- | ----------------------------------- | ------------------------------------ | -------------------------- | ------------------------------- |
 | N/A                                   | N/A                                     | [`release/dap-draft-03`][branch-03] | [`draft-irtf-cfrg-vdaf-03`][vdaf-03] | Yes                        | Unmaintained as of May 22, 2023 |
-| [`@divviup/[email protected]`][npm-vdaf-0.1.0] | [`@divviup/[email protected]`][npm-prio3-0.1.0] | [`release/dap-draft-04`][branch-04] | [`draft-irtf-cfrg-vdaf-05`][vdaf-05] | Yes                        | Supported                       |
-| [`@divviup/[email protected]`][npm-vdaf-0.7.0] | [`@divviup/[email protected]`][npm-prio3-0.7.0] | [`release/dap-draft-07`][branch-07] | [`draft-irtf-cfrg-vdaf-07`][vdaf-07] | Yes                        | Supported                       |
+| [`@divviup/[email protected]`][npm-vdaf-0.1.0] | [`@divviup/[email protected]`][npm-prio3-0.1.0] | [`release/dap-draft-04`][branch-04] | [`draft-irtf-cfrg-vdaf-05`][vdaf-05] | Yes                        | Unmaintained as of June 24, 2024 |
+| [`@divviup/[email protected]`][npm-vdaf-0.7.0] | [`@divviup/[email protected]`][npm-prio3-0.7.0] | [`release/dap-draft-07`][branch-07] | [`draft-irtf-cfrg-vdaf-07`][vdaf-07] | Yes                        | Unmaintained as of June 24, 2024 |
 | [`@divviup/[email protected]`][npm-vdaf-0.8.0] | [`@divviup/[email protected]`][npm-prio3-0.8.0] | [`main`][main]                      | [`draft-irtf-cfrg-vdaf-08`][vdaf-08] | Yes                        | Supported                       |
 
 ## Bundling into an npm application