Remove test for IPv4 compatible IPv6 address

An example of this can be found in RFC 2732, but it is obsoleted by
RFC 3986 whose syntax for IPv6address does not allow dots.

Also, Appendix D of RFC 3986:

As [RFC2732] defers to [RFC3513] for definition of an IPv6 literal
address, which, unfortunately, lacks an ABNF description of
IPv6address, we created a new ABNF rule for IPv6address that matches
the text representations defined by Section 2.2 of [RFC3513].

See gh-33639

spring-web/src/test/java/org/springframework/web/util/UriComponentsBuilderTests.java

@@ -238,10 +238,6 @@ void fromUriStringIPv6Host() {
 		UriComponents result = UriComponentsBuilder
 				.fromUriString("http://[1abc:2abc:3abc::5ABC:6abc]:8080/resource").build().encode();
 		assertThat(result.getHost()).isEqualToIgnoringCase("[1abc:2abc:3abc::5ABC:6abc]");
-
-		UriComponents resultIPv4compatible = UriComponentsBuilder
-				.fromUriString("http://[::192.168.1.1]:8080/resource").build().encode();
-		assertThat(resultIPv4compatible.getHost()).isEqualTo("[::c0a8:101]");
 	}
 
 	@Test