Remove commons-logging dependency for starter projects

spring-boot-starters/spring-boot-starter-parent/pom.xml

@@ -21,6 +21,18 @@
 	</properties>
 	<dependencyManagement>
 		<dependencies>
+			<dependency>
+				<groupId>org.springframework</groupId>
+				<artifactId>spring-core</artifactId>
+				<version>${spring.version}</version>
+				<exclusions>
+					<!-- Starters use SLF4J -->
+					<exclusion>
+						<groupId>commons-logging</groupId>
+						<artifactId>commons-logging</artifactId>
+					</exclusion>
+				</exclusions>
+			</dependency>
 			<dependency>
 				<groupId>org.springframework.boot</groupId>
 				<artifactId>spring-boot</artifactId>

spring-boot-starters/spring-boot-starter-parent/src/main/maven/pom.xml

@@ -21,6 +21,18 @@
 	</properties>
 	<dependencyManagement>
 		<dependencies>
+			<dependency>
+				<groupId>org.springframework</groupId>
+				<artifactId>spring-core</artifactId>
+				<version>${spring.version}</version>
+				<exclusions>
+					<!-- Starters use SLF4J -->
+					<exclusion>
+						<groupId>commons-logging</groupId>
+						<artifactId>commons-logging</artifactId>
+					</exclusion>
+				</exclusions>
+			</dependency>
 			<dependency>
 				<groupId>org.springframework.boot</groupId>
 				<artifactId>spring-boot</artifactId>