Remove redundant dependency (#490)

Author: dr0i

metamorph/build.gradle

@@ -27,7 +27,6 @@ dependencies {
   implementation project(':metafacture-javaintegration')
   implementation "com.google.guava:guava:${versions.guava}"
   implementation "org.slf4j:slf4j-api:${versions.slf4j}"
-  implementation "org.slf4j:slf4j-api:${versions.slf4j}"
   testRuntimeOnly "org.slf4j:slf4j-simple:${versions.slf4j}"
   testImplementation "junit:junit:${versions.junit}"
   testImplementation "org.mockito:mockito-core:${versions.mockito}"