Simplify the Seriatim role

meta/argument_specs.yml

@@ -6,19 +6,11 @@ argument_specs:
       seriatim_version:
         type: str
         required: true
-        description: Release identity expected from the installed binary.
+        description: Git revision and version injected into the executable.
       seriatim_repository_url:
         type: str
         required: true
         description: Git repository containing Seriatim source.
-      seriatim_source_ref:
-        type: str
-        required: true
-        description: Git tag, branch, or commit to check out.
-      seriatim_build_version:
-        type: str
-        required: true
-        description: Version value injected into build metadata.
       seriatim_source_dir:
         type: path
         required: true
@@ -27,10 +19,6 @@ argument_specs:
         type: path
         required: true
         description: Installed executable path.
-      seriatim_build_state_dir:
-        type: path
-        required: true
-        description: Sidecar directory holding successful build state.
       seriatim_manage_build_dependencies:
         type: bool
         required: true
@@ -39,20 +27,3 @@ argument_specs:
         type: str
         required: true
         description: Go Snap channel to install.
-      seriatim_go_binary:
-        type: path
-        required: true
-        description: Go executable used for discovery and builds.
-      seriatim_go_build_flags:
-        type: list
-        elements: str
-        required: true
-        description: Ordered arguments passed to go build before ldflags.
-      seriatim_go_ldflags:
-        type: str
-        required: true
-        description: Linker flags passed to go build as one argument.
-      seriatim_go_package:
-        type: str
-        required: true
-        description: Go package built from the source checkout.