remove not needed dep

Author: andimarek

graphql-java-spring-web/build.gradle

@@ -7,7 +7,6 @@ dependencies {
     compile "org.springframework:spring-context:$springVersion"
     compile "com.fasterxml.jackson.core:jackson-databind:$jacksonVersion"
     compile "com.graphql-java:graphql-java:$graphqlJavaVersion"
-    compile "javax.servlet:javax.servlet-api:4.0.1"
 
     testCompile group: 'junit', name: 'junit', version: '4.12'
     testCompile "org.springframework:spring-test:$springVersion"