Remove 'toolchains-plugin.version' property

Author: sbabcoc

pom.xml

@@ -38,7 +38,6 @@
     <guava.version>30.1-android</guava.version>
     <junitparams.version>1.1.1</junitparams.version>
     <powermock.version>2.0.9</powermock.version>
-    <toolchains-plugin.version>1.1</toolchains-plugin.version>
     <compiler-plugin.version>3.8.1</compiler-plugin.version>
     <surefire-plugin.version>2.22.0</surefire-plugin.version>
     <source-plugin.version>3.2.0</source-plugin.version>