Remove unused libraries and code

spring-web-modules/spring-web-url/pom.xml

@@ -20,10 +20,6 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-validation</artifactId>
-        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
@@ -34,52 +30,15 @@
             <artifactId>spring-boot-starter-thymeleaf</artifactId>
             <scope>provided</scope>
         </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-data-jpa</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-mail</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-actuator</artifactId>
-        </dependency>
-
-        <dependency>
-            <groupId>org.subethamail</groupId>
-            <artifactId>subethasmtp</artifactId>
-            <version>${subethasmtp.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.httpcomponents</groupId>
-            <artifactId>httpclient</artifactId>
-            <version>${httpclient.version}</version>
-        </dependency>
-        <dependency>
-		    <groupId>org.junit.vintage</groupId>
-		    <artifactId>junit-vintage-engine</artifactId>
-		    <scope>test</scope>
-		</dependency>
     </dependencies>
 
     <build>
         <finalName>${project.artifactId}</finalName>
-        <resources>
-            <resource>
-                <directory>src/main/resources</directory>
-                <filtering>true</filtering>
-            </resource>
-        </resources>
     </build>
 
     <properties>
         <!-- The main class to start by executing java -jar -->
         <start-class>com.baeldung.exclude_urls_filter.Application</start-class>
-        <subethasmtp.version>3.1.7</subethasmtp.version>
-        <httpclient.version>4.5.8</httpclient.version>
     </properties>
 
 </project>

spring-web-modules/spring-web-url/src/main/java/com/baeldung/exclude_urls_filter/Application.java

@@ -2,9 +2,15 @@ package com.baeldung.exclude_urls_filter;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
+import org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration;
+import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration;
 
 
-@SpringBootApplication
+@SpringBootApplication(exclude = {
+	    DataSourceAutoConfiguration.class,
+	    DataSourceTransactionManagerAutoConfiguration.class,
+	    HibernateJpaAutoConfiguration.class})
 public class Application {
 
     public static void main(String[] args) {

spring-web-modules/spring-web-url/src/main/java/com/baeldung/form_submission/Application.java

@@ -2,9 +2,15 @@ package com.baeldung.form_submission;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
+import org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration;
+import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration;
 import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
 
-@SpringBootApplication
+@SpringBootApplication(exclude = {
+	    DataSourceAutoConfiguration.class,
+	    DataSourceTransactionManagerAutoConfiguration.class,
+	    HibernateJpaAutoConfiguration.class})
 public class Application extends SpringBootServletInitializer {
 
     public static void main(String[] args) {

spring-web-modules/spring-web-url/src/main/resources/application.properties

@@ -1,6 +1,3 @@
-spring.mail.host=localhost
-spring.mail.port=8025
-
 spring.thymeleaf.cache=false
 spring.thymeleaf.enabled=true 
 spring.thymeleaf.prefix=classpath:/templates/