Changes

Remove environment variable to disable transformation

TR_disableImplEncodeAsciiArray was added to disable arraytranslate
transformation of the StringCoding.implEncodeAsciiArray method. This
commit removes the use of this variable as it is not needed, and
the preexisting -Xjit:disableConverterReducer option provides an
almost similar granularity of control in disabling this transformation.
 (commit: fffe86f)