MetaspaceHandleDeallocations can be used to switch off deallocation handling (which takes care of reusing prematurely deallocated metaspace blocks in case of e.g. class redefinitions or class loading errors).

The purpose of this switch had been to switch off the dealloation handling for error analysis. It had been very rarely used, only in the first stages of JEP 387, and it is not covered by tests. I propose to remove it to reduce code complexity.