fix: add missing imports and remove unused imports

pkg/execution/execution_test.go

@@ -8,8 +8,6 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/stretchr/testify/assert"
-
-	"github.com/fraktal/mev-beta/internal/logger"
 )
 
 func TestExecutionModes(t *testing.T) {

pkg/scanner/swap/analyzer_test.go

@@ -5,6 +5,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/ethereum/go-ethereum/common"
 	"github.com/stretchr/testify/assert"
 
 	"github.com/fraktal/mev-beta/internal/logger"