Remove unused tags from initial build.gradle

Fixes gh-32

initial/build.gradle

 targetCompatibility = 1.8
 
 dependencies {
-    // tag::jetty[]
-    compile("org.springframework.boot:spring-boot-starter-web") {
-        exclude module: "spring-boot-starter-tomcat"
-    }
-    compile("org.springframework.boot:spring-boot-starter-jetty")
-    // end::jetty[]
-    // tag::actuator[]
-    compile("org.springframework.boot:spring-boot-starter-actuator")
-    // end::actuator[]
+    compile("org.springframework.boot:spring-boot-starter-web")
     testCompile("junit:junit")
 }