Rust: Fix a couple of comments.

Author: geoffw0

rust/ql/lib/codeql/rust/security/LogInjectionExtensions.qll

@@ -46,7 +46,7 @@ module LogInjection {
 
   /**
    * A barrier for log injection vulnerabilities for nodes whose type is a
-   * numeric or boolean type, which is unlikely to expose any vulnerability.
+   * numeric type, which is unlikely to expose any vulnerability.
    */
   private class NumericTypeBarrier extends Barrier instanceof Barriers::NumericTypeBarrier { }
 

rust/ql/lib/codeql/rust/security/SqlInjectionExtensions.qll

@@ -60,8 +60,8 @@ module SqlInjection {
   }
 
   /**
-   * A barrier for SQL injection vulnerabilities for nodes whose type is a numeric or
-   * boolean type, which is unlikely to expose any vulnerability.
+   * A barrier for SQL injection vulnerabilities for nodes whose type is a numeric
+   * type, which is unlikely to expose any vulnerability.
    */
   private class NumericTypeBarrier extends Barrier instanceof Barriers::NumericTypeBarrier { }
 

rust/ql/lib/codeql/rust/security/regex/RegexInjectionExtensions.qll

@@ -89,7 +89,7 @@ module RegexInjection {
 
   /**
    * A barrier for regular expression injection vulnerabilities for nodes whose
-   * type is an integral or boolean type, which is unlikely to expose any vulnerability.
+   * type is an integral type, which is unlikely to expose any vulnerability.
    *
    * We don't include floating point types in this barrier, as `.` is a special character
    * in regular expressions.