[clang-tidy] Remove cert-dcl21-cpp check (#80181)

Deprecated since clang-tidy 17. The rule DCL21-CPP has been removed from
the CERT guidelines, so it does not make sense to keep the check.

Fixes #42788

Co-authored-by: Carlos Gálvez <[email protected]>

Author: carlosgalvezp

clang-tools-extra/clang-tidy/cert/CERTTidyModule.cpp

@@ -33,7 +33,6 @@
 #include "LimitedRandomnessCheck.h"
 #include "MutatingCopyCheck.h"
 #include "NonTrivialTypesLibcMemoryCallsCheck.h"
-#include "PostfixOperatorCheck.h"
 #include "ProperlySeededRandomGeneratorCheck.h"
 #include "SetLongJmpCheck.h"
 #include "StaticObjectExceptionCheck.h"
@@ -239,8 +238,6 @@ class CERTModule : public ClangTidyModule {
     CheckFactories.registerCheck<bugprone::SpuriouslyWakeUpFunctionsCheck>(
         "cert-con54-cpp");
     // DCL
-    CheckFactories.registerCheck<PostfixOperatorCheck>(
-        "cert-dcl21-cpp");
     CheckFactories.registerCheck<VariadicFunctionDefCheck>("cert-dcl50-cpp");
     CheckFactories.registerCheck<bugprone::ReservedIdentifierCheck>(
         "cert-dcl51-cpp");

clang-tools-extra/clang-tidy/cert/CMakeLists.txt

@@ -12,7 +12,6 @@ add_clang_library(clangTidyCERTModule
   LimitedRandomnessCheck.cpp
   MutatingCopyCheck.cpp
   NonTrivialTypesLibcMemoryCallsCheck.cpp
-  PostfixOperatorCheck.cpp
   ProperlySeededRandomGeneratorCheck.cpp
   SetLongJmpCheck.cpp
   StaticObjectExceptionCheck.cpp

clang-tools-extra/clang-tidy/cert/PostfixOperatorCheck.cpp

@@ -116,7 +116,6 @@ FAST(cert-con36-c, 2.0)
 FAST(cert-con54-cpp, 3.0)
 FAST(cert-dcl03-c, 2.0)
 FAST(cert-dcl16-c, -1.0)
-FAST(cert-dcl21-cpp, 0.0)
 FAST(cert-dcl37-c, 3.0)
 FAST(cert-dcl50-cpp, -1.0)
 FAST(cert-dcl51-cpp, 1.0)

clang-tools-extra/clang-tidy/cert/PostfixOperatorCheck.h

@@ -109,6 +109,9 @@ Changes in existing checks
 Removed checks
 ^^^^^^^^^^^^^^
 
+- Removed `cert-dcl21-cpp`, which was deprecated since :program:`clang-tidy` 17,
+  since the rule DCL21-CPP has been removed from the CERT guidelines.
+
 Improvements to include-fixer
 -----------------------------
 

clang-tools-extra/clangd/TidyFastChecks.inc

@@ -155,7 +155,6 @@ Clang-Tidy Checks
    :doc:`bugprone-unused-return-value <bugprone/unused-return-value>`,
    :doc:`bugprone-use-after-move <bugprone/use-after-move>`,
    :doc:`bugprone-virtual-near-miss <bugprone/virtual-near-miss>`, "Yes"
-   :doc:`cert-dcl21-cpp <cert/dcl21-cpp>`, "Yes"
    :doc:`cert-dcl50-cpp <cert/dcl50-cpp>`,
    :doc:`cert-dcl58-cpp <cert/dcl58-cpp>`,
    :doc:`cert-env33-c <cert/env33-c>`,

clang-tools-extra/docs/ReleaseNotes.rst

@@ -985,8 +985,6 @@ clang-tools-extra/clang-tidy/cert/MutatingCopyCheck.cpp
 clang-tools-extra/clang-tidy/cert/MutatingCopyCheck.h
 clang-tools-extra/clang-tidy/cert/NonTrivialTypesLibcMemoryCallsCheck.cpp
 clang-tools-extra/clang-tidy/cert/NonTrivialTypesLibcMemoryCallsCheck.h
-clang-tools-extra/clang-tidy/cert/PostfixOperatorCheck.cpp
-clang-tools-extra/clang-tidy/cert/PostfixOperatorCheck.h
 clang-tools-extra/clang-tidy/cert/ProperlySeededRandomGeneratorCheck.cpp
 clang-tools-extra/clang-tidy/cert/ProperlySeededRandomGeneratorCheck.h
 clang-tools-extra/clang-tidy/cert/SetLongJmpCheck.cpp

clang-tools-extra/docs/clang-tidy/checks/cert/dcl21-cpp.rst

@@ -23,7 +23,6 @@ static_library("cert") {
     "LimitedRandomnessCheck.cpp",
     "MutatingCopyCheck.cpp",
     "NonTrivialTypesLibcMemoryCallsCheck.cpp",
-    "PostfixOperatorCheck.cpp",
     "ProperlySeededRandomGeneratorCheck.cpp",
     "SetLongJmpCheck.cpp",
     "StaticObjectExceptionCheck.cpp",