Implement remaining cleanup items prior to the next release

internal/sources/spc/convective_outlook_test.go

@@ -4,8 +4,6 @@ import (
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
-	"os"
-	"path/filepath"
 	"strings"
 	"testing"
 	"time"
@@ -340,16 +338,6 @@ func discussionFixtureForProduct(t *testing.T, key string) []byte {
 	}
 }
 
-func readSPCTestFixture(t *testing.T, name string) []byte {
-	t.Helper()
-	path := filepath.Join("..", "..", "providers", "spc", "testdata", name)
-	raw, err := os.ReadFile(path)
-	if err != nil {
-		t.Fatalf("read fixture %s: %v", path, err)
-	}
-	return raw
-}
-
 const testRSS = `<?xml version="1.0"?>
 <rss version="2.0">
   <channel>