AVRO-3936: Clean up NOTICE file (#2729)

Ivy is not used anymore. A long time ago
it was used on the Python side:
https://github.com/apache/avro/blob/4f6eb207b1df2ff438d952e383041021f0275705/lang/py/build.xml

LICENSE.txt

@@ -295,16 +295,6 @@ Copyright (C) 2006 Toni Ronkko
 | ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 | OTHER DEALINGS IN THE SOFTWARE.
 
-----------------------------------------------------------------------
-License for ivy-2.2.0.jar used in the python implementation:
-
-Apache License version 2.0 (see above)
-
-----------------------------------------------------------------------
-License for pyAntTasks-1.3.jar used in the python implementation:
-
-Apache License version 2.0 (see above)
-
 ----------------------------------------------------------------------
 License for NUnit binary included with the C# implementation:
 File: nunit.framework.dll

NOTICE.txt

@@ -37,25 +37,6 @@ The Odiago NOTICE at the time of the contribution:
 | This product includes software developed by Odiago, Inc.
 | (https://www.wibidata.com).
 
-Apache Ivy includes the following in its NOTICE file:
-
-| Apache Ivy
-| Copyright 2007-2010 The Apache Software Foundation
-|
-| This product includes software developed by
-| The Apache Software Foundation (https://www.apache.org/).
-|
-| Portions of Ivy were originally developed by
-| Jayasoft SARL (http://www.jayasoft.fr/)
-| and are licensed to the Apache Software Foundation under the
-| "Software Grant License Agreement"
-|
-| SSH and SFTP support is provided by the JCraft JSch package, 
-| which is open source software, available under
-| the terms of a BSD style license.  
-| The original software and related information is available
-| at http://www.jcraft.com/jsch/. 
-
 Apache Log4Net includes the following in its NOTICE file:
 
 | Apache log4net

build.sh

@@ -283,7 +283,6 @@ do
       rm -rf lang/perl/inc/
       rm -rf lang/ruby/.gem/
       rm -rf lang/ruby/Gemfile.lock
-      rm -rf lang/py/lib/ivy-2.2.0.jar
       rm -rf lang/csharp/src/apache/ipc.test/bin/
       rm -rf lang/csharp/src/apache/ipc.test/obj
       ;;