Remove redundant unconditional setup-stackql step

stackql-assert ran setup-stackql on every invocation and then called
stackql-exec, which already performs a guarded, reuse-if-present install.
The extra setup step re-downloaded the binary each time, and when it ran
after a workflow flipped the releases "latest" pointer it could 404.

Drop the redundant step; setup is handled by stackql-exec. The Check
Results step needs no stackql binary.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: jeffreyaven

action.yml

@@ -33,11 +33,9 @@ inputs:
 runs:
   using: "composite"
   steps:
-    - name: Setup StackQL
-      uses: stackql/setup-stackql@v2
-      with:
-        use_wrapper: true
-
+    # No setup-stackql here: stackql-exec (invoked below) performs a guarded
+    # install that reuses an existing binary if one is already on PATH. Running
+    # setup-stackql again here would re-download unconditionally.
     - name: Execute StackQL Command
       id: exec-query
       uses: stackql/stackql-exec@v2