Remove PostgreSQL prompt symbol guide

SeaQL · billy1624 · Jul 15, 2022 · May 31, 2022 · May 31, 2022 · May 31, 2022
commit 206679a65cd4d68a729b8e69ea032fee06ca0b73
diff --git a/tutorials-book/src/ch00-00-introduction.md b/tutorials-book/src/ch00-00-introduction.md
@@ -16,8 +16,6 @@ To show added or removed code from files, we will use comments or
 
 `$ ` shows an operation is done on the console/shell 
 
-`postgres=#` shows a PostgreSQL prompt.
-
 #### Chapters
 
 In the first chapter, we will learn how to build a backend application with SeaORM. It will be compatible with different database implementations.