restore .clang-tidy to upstream version

Author: bhavishy2801

.clang-tidy

@@ -6,8 +6,7 @@ Checks: >
     cppcoreguidelines-avoid-capturing-lambda-coroutines,
     cppcoreguidelines-avoid-goto,
     cppcoreguidelines-avoid-non-const-global-variables,
-    cppcoreguidelines-avoid-reference-coroutine-parameters,
-    cppcoreguidelines-explicit-virtual-functions
+    cppcoreguidelines-avoid-reference-coroutine-parameters
 
 WarningsAsErrors: ''
 HeaderFilterRegex: './include'