[eacsl:tests] Remove obsolete oracles

src/plugins/e-acsl/tests/arith/oracle_dev/arith.res.oracle

-[kernel] Parsing tests/arith/arith.i (no preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/array.res.oracle

-[kernel] Parsing tests/arith/array.i (no preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/at.res.oracle

-[kernel] Parsing tests/arith/at.i (no preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/at_on-purely-logic-variables.res.oracle

-[kernel] Parsing tests/arith/at_on-purely-logic-variables.c (with preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/bitwise.res.oracle

-[kernel] Parsing tests/arith/bitwise.c (with preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/cast.res.oracle

-[kernel] Parsing tests/arith/cast.i (no preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/comparison.res.oracle

-[kernel] Parsing tests/arith/comparison.i (no preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/functions.res.oracle

-[kernel] Parsing tests/arith/functions.c (with preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/functions_rec.res.oracle

-[kernel] Parsing tests/arith/functions_rec.c (with preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/integer_constant.res.oracle

-[kernel] Parsing tests/arith/integer_constant.i (no preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/let.res.oracle

-[kernel] Parsing tests/arith/let.c (with preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/longlong.res.oracle

-[kernel] Parsing tests/arith/longlong.i (no preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/not.res.oracle

-[kernel] Parsing tests/arith/not.i (no preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/quantif.res.oracle

-[kernel] Parsing tests/arith/quantif.i (no preprocessing)

src/plugins/e-acsl/tests/arith/oracle_dev/rationals.res.oracle

-[kernel] Parsing tests/arith/rationals.c (with preprocessing)
-[kernel:parser:decimal-float] tests/arith/rationals.c:19: Warning: 
-  Floating-point constant 0.2f is not represented exactly. Will use 0x1.99999a0000000p-3.
-  (warn-once: no further messages from category 'parser:decimal-float' will be emitted)

src/plugins/e-acsl/tests/bts/oracle_dev/bts1304.res.oracle

-[kernel] Parsing tests/bts/bts1304.i (no preprocessing)

src/plugins/e-acsl/tests/bts/oracle_dev/bts1307.res.oracle

-[kernel] Parsing tests/bts/bts1307.i (no preprocessing)
-[kernel:parser:decimal-float] tests/bts/bts1307.i:17: Warning: 
-  Floating-point constant 0.4 is not represented exactly. Will use 0x1.999999999999ap-2.
-  (warn-once: no further messages from category 'parser:decimal-float' will be emitted)

src/plugins/e-acsl/tests/bts/oracle_dev/bts1324.res.oracle

-[kernel] Parsing tests/bts/bts1324.i (no preprocessing)

src/plugins/e-acsl/tests/bts/oracle_dev/bts1326.res.oracle

-[kernel] Parsing tests/bts/bts1326.i (no preprocessing)

src/plugins/e-acsl/tests/bts/oracle_dev/bts1386_complex_flowgraph.res.oracle

-[kernel] Parsing tests/bts/bts1386_complex_flowgraph.c (with preprocessing)