Revert "Merge pull request #220 in CASA/casa6 from CAS-13048 to master"
This reverts commit 54c60aeb311e7f270294f20f8488b32657fd6338, reversing
changes made to af053fc12679def07785e3b76e2fb314670580b1.
Merge pull request #220 in CASA/casa6 from CAS-13048 to master
* commit '7f4c612fb8353c738038cb8dbb32043beeb2ad61':
fix leak of logger obj in tableplot tool, CAS-13048
prevent leak of itsResetCallBack in MsPlot, CAS-13048
prevent leak of logger obj in imagepol, CAS-13048
prevent leak of logger obj in mstransformer, CAS-13048