diff --git a/core/src/main/java/org/springframework/security/core/authority/AuthorityUtils.java b/core/src/main/java/org/springframework/security/core/authority/AuthorityUtils.java
index 5c7165bde5..98dbbe0e52 100644
--- a/core/src/main/java/org/springframework/security/core/authority/AuthorityUtils.java
+++ b/core/src/main/java/org/springframework/security/core/authority/AuthorityUtils.java
@@ -22,7 +22,6 @@ import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
-import java.util.stream.Stream;
 
 import org.springframework.security.core.GrantedAuthority;
 import org.springframework.util.Assert;
@@ -40,8 +39,6 @@ public final class AuthorityUtils {
 
 	public static final List<GrantedAuthority> NO_AUTHORITIES = Collections.emptyList();
 
-	private static String[] KNOWN_PREFIXES = { "ROLE_", "SCOPE_", "FACTOR_" };
-
 	private AuthorityUtils() {
 	}
 
@@ -96,38 +93,4 @@ public final class AuthorityUtils {
 		return grantedAuthorities;
 	}
 
-	/**
-	 * Return a {@link Stream} containing only the authorities of the given type;
-	 * {@code "ROLE"}, {@code "SCOPE"}, or {@code "FACTOR"}.
-	 * @param type the authority type; {@code "ROLE"}, {@code "SCOPE"}, or
-	 * {@code "FACTOR"}
-	 * @param authorities the list of authorities
-	 * @return a {@link Stream} containing the authorities of the given type
-	 */
-	public static Stream<GrantedAuthority> authoritiesOfType(String type, Collection<GrantedAuthority> authorities) {
-		return authorities.stream().filter((a) -> a.getAuthority().startsWith(type + "_"));
-	}
-
-	/**
-	 * Return the simple name of a {@link GrantedAuthority}, which is its name, less any
-	 * common prefix; that is, {@code ROLE_}, {@code SCOPE_}, or {@code FACTOR_}.
-	 * <p>
-	 * For example, if the authority is {@code ROLE_USER}, then the simple name is
-	 * {@code user}.
-	 * <p>
-	 * If the authority is {@code FACTOR_PASSWORD}, then the simple name is
-	 * {@code password}.
-	 * @param authority the granted authority
-	 * @return the simple name of the authority
-	 */
-	public static String getSimpleName(GrantedAuthority authority) {
-		String name = authority.getAuthority();
-		for (String prefix : KNOWN_PREFIXES) {
-			if (name.startsWith(prefix)) {
-				return name.substring(prefix.length());
-			}
-		}
-		return name;
-	}
-
 }
diff --git a/core/src/test/java/org/springframework/security/core/authority/AuthorityUtilsTests.java b/core/src/test/java/org/springframework/security/core/authority/AuthorityUtilsTests.java
index 0fa6643b5c..77ab2e4210 100644
--- a/core/src/test/java/org/springframework/security/core/authority/AuthorityUtilsTests.java
+++ b/core/src/test/java/org/springframework/security/core/authority/AuthorityUtilsTests.java
@@ -54,38 +54,4 @@ public class AuthorityUtilsTests {
 		assertThat(authorities).element(2).extracting(GrantedAuthority::getAuthority).isEqualTo("ROLE_C");
 	}
 
-	@Test
-	public void getSimpleNameWhenRoleThenRemovesPrefix() {
-		GrantedAuthority role = new SimpleGrantedAuthority("ROLE_ADMIN");
-		assertThat(AuthorityUtils.getSimpleName(role)).isEqualTo("ADMIN");
-	}
-
-	@Test
-	public void getSimpleNameWhenScopeThenRemovesPrefix() {
-		GrantedAuthority role = new SimpleGrantedAuthority("SCOPE_message:read");
-		assertThat(AuthorityUtils.getSimpleName(role)).isEqualTo("message:read");
-	}
-
-	@Test
-	public void getSimpleNameWhenFactorThenRemovesPrefix() {
-		GrantedAuthority role = new SimpleGrantedAuthority("FACTOR_PASSWORD");
-		assertThat(AuthorityUtils.getSimpleName(role)).isEqualTo("PASSWORD");
-	}
-
-	@Test
-	public void authoritiesOfTypeWhenEmptyThenReturnsEmptyStream() {
-		List<GrantedAuthority> authorities = AuthorityUtils.createAuthorityList("ROLE_USER");
-		List<GrantedAuthority> factors = AuthorityUtils.authoritiesOfType("FACTOR", authorities).toList();
-		assertThat(factors).isEmpty();
-	}
-
-	@Test
-	public void authoritiesOfTypeWhenFactorsThenReturnsOnlyFactors() {
-		List<GrantedAuthority> authorities = AuthorityUtils.createAuthorityList("ROLE_USER", "FACTOR_PASSWORD",
-				"FACTOR_OTT");
-		List<GrantedAuthority> factors = AuthorityUtils.authoritiesOfType("FACTOR", authorities).toList();
-		assertThat(factors).extracting(GrantedAuthority::getAuthority)
-			.containsExactlyInAnyOrder("FACTOR_PASSWORD", "FACTOR_OTT");
-	}
-
 }