[tests] remove 'COMMENT: no diff' lines from bts and e-acsl-runtime tests

src/plugins/e-acsl/tests/bts/bts1304.i

src/plugins/e-acsl/tests/bts/bts1307.i

src/plugins/e-acsl/tests/bts/bts1324.i

src/plugins/e-acsl/tests/bts/bts1326.i

src/plugins/e-acsl/tests/bts/bts1390.c

src/plugins/e-acsl/tests/bts/bts1398.c

src/plugins/e-acsl/tests/bts/bts1399.c

src/plugins/e-acsl/tests/bts/bts1478.c

src/plugins/e-acsl/tests/bts/bts1700.i

src/plugins/e-acsl/tests/bts/bts1717.i

src/plugins/e-acsl/tests/bts/bts1837.i

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

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

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

src/plugins/e-acsl/tests/bts/oracle/bts1390.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1399.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1837.res.oracle

src/plugins/e-acsl/tests/bts/oracle/gen_bts1304.c

src/plugins/e-acsl/tests/bts/oracle/gen_bts1307.c

src/plugins/e-acsl/tests/bts/oracle/gen_bts1324.c