chore(config): Remove bogus clang-diagnostic "checkers"

These results were added in commit 8d1a7fe by
a previous generation of the label generator tooling but these are
completely erroneous findings caused by misparsing the `DiagnosticsReference`.

config/labels/analyzers/clang-tidy.json

@@ -1150,10 +1150,6 @@
       "doc_url:https://clang.llvm.org/docs/DiagnosticsReference.html#waggregate-return",
       "severity:MEDIUM"
     ],
-    "clang-diagnostic-agnostic flags": [
-      "doc_url:https://clang.llvm.org/docs/DiagnosticsReference.html#diagnostic-flags",
-      "severity:HIGH"
-    ],
     "clang-diagnostic-aix-compat": [
       "doc_url:https://clang.llvm.org/docs/DiagnosticsReference.html#waix-compat",
       "severity:MEDIUM"
@@ -2372,10 +2368,6 @@
       "profile:default",
       "severity:MEDIUM"
     ],
-    "clang-diagnostic-format-2": [
-      "doc_url:https://clang.llvm.org/docs/DiagnosticsReference.html#wformat-2",
-      "severity:MEDIUM"
-    ],
     "clang-diagnostic-format-extra-args": [
       "doc_url:https://clang.llvm.org/docs/DiagnosticsReference.html#wformat-extra-args",
       "profile:default",
@@ -4646,10 +4638,6 @@
       "profile:default",
       "severity:MEDIUM"
     ],
-    "clang-diagnostic-troduction": [
-      "doc_url:https://clang.llvm.org/docs/DiagnosticsReference.html#diagnostic-flags-in-clang",
-      "severity:HIGH"
-    ],
     "clang-diagnostic-type-limits": [
       "doc_url:https://clang.llvm.org/docs/DiagnosticsReference.html#wtype-limits",
       "severity:MEDIUM"