Revert "Add the FileAwareFactoryFn and the KerberosConsumerFactoryFn classes to support consumer factories which pull files from GCS."

This reverts commit f8f69d9.

Author: fozzie15

sdks/java/io/kafka/build.gradle

@@ -99,9 +99,6 @@ dependencies {
   testImplementation project(path: ":sdks:java:extensions:protobuf", configuration: "testRuntimeMigration")
   testImplementation project(path: ":sdks:java:io:common")
   testImplementation project(path: ":sdks:java:testing:test-utils")
-  testImplementation project(path: ":runners:google-cloud-dataflow-java")
-  testImplementation project(path: ":sdks:java:extensions:google-cloud-platform-core")
-  testImplementation project(path: ":sdks:java:io:google-cloud-platform")
   // For testing Cross-language transforms
   testImplementation library.java.avro
   testImplementation library.java.junit