[TOREE-450] Revert "[MINOR] Add log4j test configuration"

This reverts commit ddba37a20c00039a3d70402b430c9a51737a5d37
which started causing the "dupplicate mappings" issues as the
sbt build is actually copying log4j resource from root resource
folder to all projects during build.
diff --git a/scala-interpreter/src/test/resources/log4j.properties b/scala-interpreter/src/test/resources/log4j.properties
deleted file mode 100644
index 439958d..0000000
--- a/scala-interpreter/src/test/resources/log4j.properties
+++ /dev/null
@@ -1,22 +0,0 @@
-#
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License
-#
-
-log4j.rootCategory=INFO, console
-log4j.appender.console=org.apache.log4j.ConsoleAppender
-log4j.appender.console.target=System.err
-log4j.appender.console.layout=org.apache.log4j.PatternLayout
-log4j.appender.console.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n