Replace early SpringProperties logger usage with System.err

Closes gh-26120

spring-core/src/main/java/org/springframework/core/SpringProperties.java

@@ -21,9 +21,6 @@ import java.io.InputStream;
 import java.net.URL;
 import java.util.Properties;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-
 import org.springframework.lang.Nullable;
 
 /**
@@ -50,8 +47,6 @@ public final class SpringProperties {
 
 	private static final String PROPERTIES_RESOURCE_LOCATION = "spring.properties";
 
-	private static final Log logger = LogFactory.getLog(SpringProperties.class);
-
 	private static final Properties localProperties = new Properties();
 
 
@@ -61,16 +56,13 @@ public final class SpringProperties {
 			URL url = (cl != null ? cl.getResource(PROPERTIES_RESOURCE_LOCATION) :
 					ClassLoader.getSystemResource(PROPERTIES_RESOURCE_LOCATION));
 			if (url != null) {
-				logger.debug("Found 'spring.properties' file in local classpath");
 				try (InputStream is = url.openStream()) {
 					localProperties.load(is);
 				}
 			}
 		}
 		catch (IOException ex) {
-			if (logger.isInfoEnabled()) {
-				logger.info("Could not load 'spring.properties' file from local classpath: " + ex);
-			}
+			System.err.println("Could not load 'spring.properties' file from local classpath: " + ex);
 		}
 	}
 
@@ -108,9 +100,7 @@ public final class SpringProperties {
 				value = System.getProperty(key);
 			}
 			catch (Throwable ex) {
-				if (logger.isDebugEnabled()) {
-					logger.debug("Could not retrieve system property '" + key + "': " + ex);
-				}
+				System.err.println("Could not retrieve system property '" + key + "': " + ex);
 			}
 		}
 		return value;