CPP: Update expected for changes elsewhere.

Author: geoffw0

cpp/ql/test/query-tests/Security/CWE/CWE-190/semmle/tainted/ArithmeticTainted.expected

@@ -8,6 +8,3 @@
 | test.c:14:15:14:28 | maxConnections | $@ flows to here and is used in arithmetic, potentially causing an underflow. | test.c:11:29:11:32 | argv | User-provided value |
 | test.c:44:7:44:10 | len2 | $@ flows to here and is used in arithmetic, potentially causing an underflow. | test.c:41:17:41:20 | argv | User-provided value |
 | test.c:54:7:54:10 | len3 | $@ flows to here and is used in arithmetic, potentially causing an underflow. | test.c:51:17:51:20 | argv | User-provided value |
-| test.c:74:7:74:10 | len5 | $@ flows to here and is used in arithmetic, potentially causing an underflow. | test.c:71:19:71:22 | argv | User-provided value |
-| test.c:84:7:84:10 | len6 | $@ flows to here and is used in arithmetic, potentially causing an underflow. | test.c:81:19:81:22 | argv | User-provided value |
-| test.c:94:7:94:10 | len7 | $@ flows to here and is used in arithmetic, potentially causing an underflow. | test.c:91:19:91:22 | argv | User-provided value |

cpp/ql/test/query-tests/Security/CWE/CWE-190/semmle/tainted/test.c

@@ -71,7 +71,7 @@ int main(int argc, char** argv) {
     len5 = strlen(argv[1]);
     while (len5)
     {
-      len5--; // GOOD: can't underflow [FALSE POSITIVE]
+      len5--; // GOOD: can't underflow
     }
   }
 
@@ -81,7 +81,7 @@ int main(int argc, char** argv) {
     len6 = strlen(argv[1]);
     while (len6 != 0)
     {
-      len6--; // GOOD: can't underflow [FALSE POSITIVE]
+      len6--; // GOOD: can't underflow
     }
   }
 
@@ -91,7 +91,7 @@ int main(int argc, char** argv) {
     len7 = strlen(argv[1]);
     while ((len7) && (1))
     {
-      len7--; // GOOD: can't underflow [FALSE POSITIVE]
+      len7--; // GOOD: can't underflow
     }
   }