ci: remove none root option, every build always has a root

.github/workflows/main.yml

@@ -36,7 +36,6 @@ on:
         description: "Root Flavor"
         type: choice
         options:
-          - none
           - KernelSU-Next
           - KernelSU
           - ReSukiSU
@@ -179,9 +178,8 @@ jobs:
 
           # Selected root implementation(s). Maps the human-facing choice
           # (KernelSU-Next / KernelSU / ReSukiSU / All) to internal root-setup
-          # flavors (next / classic / resukisu). 'none' leaves them empty so
-          # build.yml falls back to its legacy KernelSU-Next path. 'All' emits a
-          # matrix of all three root flavors plus each pinned commit.
+          # flavors (next / classic / resukisu). Every build always has a root;
+          # 'All' emits a matrix of all three root flavors plus each pinned commit.
           #
           # Always resolve all three branch-tip commits so 'All' can fan out.
           CLASSIC_COMMIT="$(resolve_sha https://github.com/tiann/KernelSU.git refs/heads/main)"
@@ -219,10 +217,8 @@ jobs:
               echo "root_commit=" >> "$GITHUB_OUTPUT"
               ;;
             *)
-              # none: legacy path, no explicit root variant
-              echo "root_flavor=" >> "$GITHUB_OUTPUT"
-              echo "root_commit=" >> "$GITHUB_OUTPUT"
-              ROOT_MATRIX="[{\"root_flavor\":\"\",\"variant\":\"\",\"root_commit\":\"\"}]"
+              echo "ERROR: unknown root_flavor '${{ inputs.root_flavor }}'" >&2
+              exit 1
               ;;
           esac
           echo "root_matrix=$ROOT_MATRIX" >> "$GITHUB_OUTPUT"
@@ -354,15 +350,8 @@ jobs:
         run: |
           set -euo pipefail
 
-          # SUSFS needs a root implementation (KernelSU / KernelSU-Next / ReSukiSU)
-          # to hook into. Without one the kernel wouldn't actually exercise the
-          # SUSFS root-hiding patches, so fail fast instead of building a useless kernel.
-          if [ "${{ inputs.use_susfs }}" = "true" ] && [ "${{ inputs.root_flavor }}" = "none" ]; then
-            echo "ERROR: SUSFS requires a root implementation, but root_flavor is 'none'." >&2
-            echo "Pick KernelSU-Next, KernelSU, or ReSukiSU in the Root Implementation box" >&2
-            echo "(SUSFS patches SUSFS's root-hiding on top of the root solution)." >&2
-            exit 1
-          fi
+          # Every build always has a root implementation (no 'none' option), so
+          # SUSFS always has a root to hook into -- no extra guard needed.
 
           # A Release/Pre-Release ships whichever manger build(s) were resolved
           # in the manager step above (exact match per root flavor). No root