Remove obsolete test suite

src/test/suite/README

src/test/suite/agg.sql

src/test/suite/date.sql

src/test/suite/float.sql

src/test/suite/group.sql

src/test/suite/group_err.sql

src/test/suite/inh.sql

src/test/suite/join.sql

src/test/suite/oper.sql

src/test/suite/parse.sql

src/test/suite/quote.sql

src/test/suite/results/agg.sql.out

src/test/suite/results/date.sql.out

src/test/suite/results/float.sql.out

src/test/suite/results/group.sql.out

src/test/suite/results/group_err.sql.out

src/test/suite/results/inh.sql.out

src/test/suite/results/join.sql.out

src/test/suite/results/oper.sql.out

src/test/suite/results/parse.sql.out