test: remove outdated test

Signed-off-by: Andres Taylor <[email protected]>

go/vt/vtgate/semantics/early_rewriter_test.go

@@ -905,53 +905,6 @@ func TestOrderByDerivedTable(t *testing.T) {
 	}
 }
 
-// TestConstantFolding tests that the rewriter is able to do various constant foldings properly.
-func TestConstantFolding(t *testing.T) {
-	ks := &vindexes.Keyspace{
-		Name:    "main",
-		Sharded: true,
-	}
-	schemaInfo := &FakeSI{
-		Tables: map[string]*vindexes.Table{
-			"t1": {
-				Keyspace: ks,
-				Name:     sqlparser.NewIdentifierCS("t1"),
-				Columns: []vindexes.Column{{
-					Name: sqlparser.NewIdentifierCI("a"),
-					Type: sqltypes.VarChar,
-				}, {
-					Name: sqlparser.NewIdentifierCI("b"),
-					Type: sqltypes.VarChar,
-				}, {
-					Name: sqlparser.NewIdentifierCI("c"),
-					Type: sqltypes.VarChar,
-				}},
-				ColumnListAuthoritative: true,
-			},
-		},
-	}
-	cDB := "db"
-	tcases := []struct {
-		sql    string
-		expSQL string
-	}{{
-		sql:    "select 1 from t1 where (a, b) in ::fkc_vals and (2 is null or (1 is null or a in (1)))",
-		expSQL: "select 1 from t1 where (a, b) in ::fkc_vals and a in (1)",
-	}, {
-		sql:    "select 1 from t1 where (false or (false or a in (1)))",
-		expSQL: "select 1 from t1 where a in (1)",
-	}}
-	for _, tcase := range tcases {
-		t.Run(tcase.sql, func(t *testing.T) {
-			ast, err := sqlparser.NewTestParser().Parse(tcase.sql)
-			require.NoError(t, err)
-			_, err = Analyze(ast, cDB, schemaInfo)
-			require.NoError(t, err)
-			require.Equal(t, tcase.expSQL, sqlparser.String(ast))
-		})
-	}
-}
-
 // TestCTEToDerivedTableRewrite checks that CTEs are correctly rewritten to derived tables
 func TestCTEToDerivedTableRewrite(t *testing.T) {
 	cDB := "db"