Remove duplicate DECIMAL foreign key test from foreign_key_queries.go

- Keep the original "decimals with foreign keys" test in script_queries.go
- Remove the duplicate "DECIMAL foreign key compatibility" test from foreign_key_queries.go
- Maintains proper test coverage while eliminating redundancy

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: elianddb

enginetest/queries/foreign_key_queries.go

@@ -2956,66 +2956,4 @@ var DropForeignKeyTests = []ScriptTest{
 			},
 		},
 	},
-	{
-		Name: "DECIMAL foreign key compatibility",
-		SetUpScript: []string{
-			"CREATE TABLE decimal_parent (d decimal(4, 2) primary key);",
-			"ALTER TABLE decimal_parent ADD INDEX idx_d (d);",
-			"INSERT INTO decimal_parent VALUES (1.23), (45.67), (78.9);",
-		},
-		Assertions: []ScriptTestAssertion{
-			{
-				Query: "CREATE TABLE decimal_child_same (d decimal(4,2), foreign key (d) references decimal_parent (d));",
-				Expected: []sql.Row{
-					{types.NewOkResult(0)},
-				},
-			},
-			{
-				Query: "INSERT INTO decimal_child_same VALUES (1.23), (45.67), (NULL);",
-				Expected: []sql.Row{
-					{types.NewOkResult(3)},
-				},
-			},
-			{
-				Query: "CREATE TABLE decimal_child_diff_scale (d decimal(4,1), foreign key (d) references decimal_parent (d));",
-				Expected: []sql.Row{
-					{types.NewOkResult(0)},
-				},
-			},
-			{
-				Query: "CREATE TABLE decimal_child_diff_precision (d decimal(3,2), foreign key (d) references decimal_parent (d));",
-				Expected: []sql.Row{
-					{types.NewOkResult(0)},
-				},
-			},
-			{
-				Query: "CREATE TABLE decimal_child_large (d decimal(65,30), foreign key (d) references decimal_parent (d));",
-				Expected: []sql.Row{
-					{types.NewOkResult(0)},
-				},
-			},
-			{
-				Query:       "INSERT INTO decimal_child_diff_scale VALUES (78.9);",
-				ExpectedErr: sql.ErrForeignKeyChildViolation,
-			},
-			{
-				Query: "INSERT INTO decimal_child_diff_precision VALUES (1.23);",
-				Expected: []sql.Row{
-					{types.NewOkResult(1)},
-				},
-			},
-			{
-				Query:       "INSERT INTO decimal_child_large VALUES (1.23);",
-				ExpectedErr: sql.ErrForeignKeyChildViolation,
-			},
-			{
-				Query:       "INSERT INTO decimal_child_same VALUES (99.99);",
-				ExpectedErr: sql.ErrForeignKeyChildViolation,
-			},
-			{
-				Query:       "INSERT INTO decimal_child_diff_scale VALUES (99.9);",
-				ExpectedErr: sql.ErrForeignKeyChildViolation,
-			},
-		},
-	},
 }