Revert "Allow ExchangeStrategies customizations in WebClient"

This reverts commit 43e047c523.

src/docs/asciidoc/web/webflux-webclient.adoc

@@ -42,14 +42,14 @@ The following example configures <<web-reactive.adoc#webflux-codecs, HTTP codecs
 [source,java,intent=0]
 [subs="verbatim,quotes"]
 ----
-	Consumer<ExchangeStrategies.Builder> customizeCodecs = builder -> {
-		builder.codecs(configurer -> {
-			//...
-		});
-	};
+	ExchangeStrategies strategies = ExchangeStrategies.builder()
+			.codecs(configurer -> {
+				// ...
+			})
+			.build();
 
 	WebClient client = WebClient.builder()
-			.exchangeStrategies(customizeCodecs)
+			.exchangeStrategies(strategies)
 			.build();
 ----
 ====
@@ -73,35 +73,7 @@ modified copy without affecting the original instance, as the following example
 ----
 ====
 
-[[webflux-client-builder-maxinmemorysize]]
-=== MaxInMemorySize
 
-Spring WebFlux configures by default a maximum size for buffering data in-memory when decoding
-HTTP responses with the `WebClient`. This avoids application memory issues if the received
-response is much larger than expected.
-
-You can configure a default value that might not be enough for your use case, and your application
-can hit that limit with the following:
-
-----
-org.springframework.core.io.buffer.DataBufferLimitException: Exceeded limit on max bytes to buffer
-----
-
-You can configure this limit on all default codecs with the following code sample:
-
-====
-[source,java,intent=0]
-[subs="verbatim,quotes"]
-----
-	WebClient webClient = WebClient.builder()
-			.exchangeStrategies(configurer ->
-				configurer.codecs(codecs ->
-					codecs.defaultCodecs().maxInMemorySize(2 * 1024 * 1024)
-				)
-			)
-			.build();
-----
-====
 
 [[webflux-client-builder-reactor]]
 === Reactor Netty