fix: removed unnecessary examples

docs/snippets/modules/chains/popular/sqlite.mdx

@@ -1,8 +1,6 @@
 import CodeBlock from "@theme/CodeBlock";
 import SqlDBExample from "@examples/chains/sql_db.ts";
 import SqlDBSqlOutputExample from "@examples/chains/sql_db_sql_output.ts";
-import SqlDBSAPHANAExample from "@examples/chains/sql_db_saphana.ts";
-import SqlDBSqlCustomPromptExample from "@examples/chains/sql_db_custom_prompt.ts";
 
 This example uses Chinook database, which is a sample database available for SQL Server, Oracle, MySQL, etc.
 
@@ -40,15 +38,3 @@ const db = await SqlDatabase.fromDataSourceParams({
 If desired, you can return the used SQL command when calling the chain.
 
 <CodeBlock language="typescript">{SqlDBSqlOutputExample}</CodeBlock>
-
-## SAP Hana
-
-Here's an example of using the chain with a SAP HANA database:
-
-<CodeBlock language="typescript">{SqlDBSAPHANAExample}</CodeBlock>
-
-## Custom prompt
-
-You can also customize the prompt that is used. Here is an example prompting the model to understand that "foobar" is the same as the Employee table:
-
-<CodeBlock language="typescript">{SqlDBSqlCustomPromptExample}</CodeBlock>