Revert "feat: upgrade environment to star-spack@0.3.0 (#588)"

[plexoos]

This reverts commit 3714f3d.

Not yet ready for prime time

[genevb]

Not sure there's really anything for me to review here. The default config did not point to these new files, so the new files were probably not used by anyone other than perhaps @plexoos since their merger yesterday AFAIK.

-Gene

[plexoos]

There are errors in ROOT6 tests like this one:

In file included from Table_Cint dictionary payload:21:
LoadTable: .L /star-sw/StarDb/Geometry/tpc/tpcPadConfig.y2019.C
In file included from /star-sw/.sl79_gcc485/include/TGenericTable.h:8:
/star-sw/.sl79_gcc485/include/TTableDescriptor.h:25:33: error: base class has incomplete type
class TTableDescriptor : public TTable {
                         ~~~~~~~^~~~~~
/star-sw/.sl79_gcc485/include/TTable.h:48:7: note: definition of 'TTable' is not complete until the closing '}'
class TTable : public TDataSet {
      ^

It is likely because I removed the TTable from ROOT6.16 and the external star-table (https://github.com/star-bnl/star-table) from the environment hoping that StRoot/Table would provide the needed functionality. Clearly, it does not. Who is maintaining StRoot/Table?