docs(README.md): remove upoz references

Author: AlcidesRC

README.md

@@ -311,20 +311,6 @@ PHP application must be placed into `src` folder.
 
 
 
-##### Testing
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-###### Mocking Date/Time functions
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-Testing with date and/or time variations sometimes can be a nightmare. To assist on this topic the **UOPZ** extension has been installed and enabled by default.
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-> [!TIP]
->
-> You can use [slope-it/clock-mock](https://github.com/slope-it/clock-mock) as a development dependency when mocking date/time functions. 
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 ### Development
 
 #### Set the environment