removing blank assignment to keep linter happy

Author: fulghum

server/analyzer/add_implicit_prefix_lengths.go

@@ -66,7 +66,7 @@ func AddImplicitPrefixLengths(_ *sql.Context, _ *analyzer.Analyzer, node sql.Nod
 				targetSchema := node.TargetSchema()
 				colMap := schToColMap(targetSchema)
 
-				for i, _ := range index.Columns {
+				for i := range index.Columns {
 					col, ok := colMap[strings.ToLower(index.Columns[i].Name)]
 					if !ok {
 						return nil, false, fmt.Errorf("indexed column %s not found in schema", index.Columns[i].Name)
@@ -91,7 +91,7 @@ func AddImplicitPrefixLengths(_ *sql.Context, _ *analyzer.Analyzer, node sql.Nod
 					newColumns[i] = copy
 				}
 				indexModified := false
-				for i, _ := range newColumns {
+				for i := range newColumns {
 					col, ok := colMap[strings.ToLower(newColumns[i].Name)]
 					if !ok {
 						return nil, false, fmt.Errorf("indexed column %s not found in schema", newColumns[i].Name)