Reduce Comments

Given that the codebase uses getBeanIfUnique logic in many places,
it is a little noisy to clarify how it works in just this location.

Instead, the previous commit simplifies the branching logic, reducing
the need for clarification of what could otherwise be surprising.

Signed-off-by: Josh Cummings <3627351+jzheaux@users.noreply.github.com>

Author: jzheaux

config/src/main/java/org/springframework/security/config/annotation/authentication/configuration/InitializeUserDetailsBeanManagerConfigurer.java

@@ -84,11 +84,7 @@ public void configure(AuthenticationManagerBuilder auth) {
 				return;
 			}
 
-			// Try to resolve a single candidate using the container's rules (@Primary,
-			// etc.)
 			UserDetailsService userDetailsService = getBeanIfUnique(UserDetailsService.class);
-
-			// If ambiguous or otherwise not resolvable, keep the warn-and-skip behavior
 			if (userDetailsService == null) {
 				this.logger.warn(LogMessage.format("Found %s UserDetailsService beans, with names %s. "
 						+ "Global Authentication Manager will not use a UserDetailsService for username/password login. "
@@ -98,7 +94,6 @@ public void configure(AuthenticationManagerBuilder auth) {
 			}
 
 			PasswordEncoder passwordEncoder = getBeanIfUnique(PasswordEncoder.class);
-			// Also resolve UDPS via container so @Primary is honored
 			UserDetailsPasswordService passwordManager = getAutowireCandidateOrNull(UserDetailsPasswordService.class);
 			CompromisedPasswordChecker passwordChecker = getBeanIfUnique(CompromisedPasswordChecker.class);