Remove dependency on log4j

Author: jpatel531

build.gradle

@@ -46,7 +46,6 @@ dependencies {
 	compile "com.google.code.gson:gson:2.2.2"
 	compile "org.slf4j:slf4j-api:1.7.5"
 	compile "org.java-websocket:java-websocket:1.3.1"
-	runtime "org.slf4j:slf4j-log4j12:1.7.5"
 	testCompile "org.mockito:mockito-all:1.8.5"
 	testCompile "org.powermock:powermock-module-junit4:1.4.11"
 	testCompile "org.powermock:powermock-api-mockito:1.4.11"