C++: Accept changes in BadAdditionOverflowCheck test following aliased SSA removal

Author: igfoo

cpp/ql/test/query-tests/Likely Bugs/Arithmetic/BadAdditionOverflowCheck/SignedOverflowCheck.expected

@@ -1,5 +1,4 @@
 | SignedOverflowCheck.cpp:8:12:8:22 | ... < ... | Testing for signed overflow may produce undefined results. |
 | SignedOverflowCheck.cpp:18:12:18:26 | ... < ... | Testing for signed overflow may produce undefined results. |
-| SignedOverflowCheck.cpp:73:6:73:36 | ... < ... | Testing for signed overflow may produce undefined results. |
 | SignedOverflowCheck.cpp:99:10:99:30 | ... <= ... | Testing for signed overflow may produce undefined results. |
 | SignedOverflowCheck.cpp:122:10:122:42 | ... <= ... | Testing for signed overflow may produce undefined results. |