[tests] remove extraneous test oracles

...tests/wp_hoare/oracle/alias_assigns_hypotheses.res.oracle

src/plugins/wp/tests/wp_plugin/oracle/unsigned.err.oracle

src/plugins/wp/tests/wp_plugin/oracle/unsigned.res.oracle

...lugins/wp/tests/wp_plugin/oracle_qualif/bool.0.res.oracle

...lugins/wp/tests/wp_tip/oracle_qualif/induction.res.oracle

...gins/wp/tests/wp_typed/oracle_qualif/user_init.res.oracle

tests/metrics/oracle/libc.3.res.oracle

tests/misc/oracle/log-file.0.res.oracle

tests/misc/oracle/log-file.1.res.oracle

tests/misc/oracle/my_visitor.res.oracle