Remove "Advanced Configuration" section from readme as it is not yet released

Author: maciejwalkowiak

README.md

@@ -70,33 +70,6 @@ It can be changed with setting `stubLocation` on `@ConfigureWireMock`:
 @ConfigureWireMock(name = "...", property = "...", stubLocation = "my-stubs")
 ```
 
-### Advanced configuration
-
-More advanced configuration can be applied through configuration customizers:
-
-```java
-@ConfigureWireMock(
-        name = "todo-service",
-        property = "todo-service.url",
-        configurationCustomizers = SampleConfigurationCustomizer.class
-)
-```
-
-Where `SampleConfigurationCustomizer` is a class implementing `WireMockConfigurationCustomizer`:
-
-```java
-class SampleConfigurationCustomizer implements WireMockConfigurationCustomizer {
-
-    @Override
-    public void customize(WireMockConfiguration configuration, ConfigureWireMock options) {
-        // apply changes to configuration
-    }
-}
-```
-
-> [!IMPORTANT]  
-> `WireMockConfigurationCustomizer` must have a no-arg constructor.
-
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