Avoid using deprecated method CompilerConfiguration.setCompilerVersion

Author: slawekjaranowski

src/main/java/org/apache/maven/plugin/compiler/AbstractCompilerMojo.java

@@ -917,8 +917,6 @@ private void executeReal() throws MojoExecutionException, CompilationFailureExce
 
         compilerConfiguration.setWorkingDirectory(basedir);
 
-        compilerConfiguration.setCompilerVersion(compilerVersion);
-
         compilerConfiguration.setBuildDirectory(buildDirectory);
 
         compilerConfiguration.setOutputFileName(outputFileName);