all: remove redundant conversions and import names (#21903)

accounts/abi/reflect_test.go

@@ -202,12 +202,12 @@ func TestConvertType(t *testing.T) {
 	fields = append(fields, reflect.StructField{
 		Name: "X",
 		Type: reflect.TypeOf(new(big.Int)),
-		Tag:  reflect.StructTag("json:\"" + "x" + "\""),
+		Tag:  "json:\"" + "x" + "\"",
 	})
 	fields = append(fields, reflect.StructField{
 		Name: "Y",
 		Type: reflect.TypeOf(new(big.Int)),
-		Tag:  reflect.StructTag("json:\"" + "y" + "\""),
+		Tag:  "json:\"" + "y" + "\"",
 	})
 	val := reflect.New(reflect.StructOf(fields))
 	val.Elem().Field(0).Set(reflect.ValueOf(big.NewInt(1)))

accounts/abi/type_test.go

@@ -255,7 +255,7 @@ func TestTypeCheck(t *testing.T) {
 		{"bytes", nil, [2]byte{0, 1}, "abi: cannot use array as type slice as argument"},
 		{"bytes", nil, common.Hash{1}, "abi: cannot use array as type slice as argument"},
 		{"string", nil, "hello world", ""},
-		{"string", nil, string(""), ""},
+		{"string", nil, "", ""},
 		{"string", nil, []byte{}, "abi: cannot use slice as type string as argument"},
 		{"bytes32[]", nil, [][32]byte{{}}, ""},
 		{"function", nil, [24]byte{}, ""},