Remove cert c obligation tag

Author: MichaelRFairhurst

c/cert/src/rules/EXP16-C/DoNotCompareFunctionPointersToConstantValues.ql

@@ -8,7 +8,6 @@
  * @problem.severity error
  * @tags external/cert/id/exp16-c
  *       correctness
- *       external/cert/obligation/recommendation
  *       external/cert/severity/low
  *       external/cert/likelihood/likely
  *       external/cert/remediation-cost/medium

rule_packages/c/Expressions2.json

@@ -14,7 +14,6 @@
           "short_name": "DoNotCompareFunctionPointersToConstantValues",
           "tags": [
             "correctness",
-            "external/cert/obligation/recommendation",
             "external/cert/severity/low",
             "external/cert/likelihood/likely",
             "external/cert/remediation-cost/medium",