clang-tidy: don't check for pass-by-value optimization

.clang-tidy

@@ -59,6 +59,7 @@ Checks:          '*
 		,-modernize-use-equals-delete
 		,-modernize-use-override
 		,-modernize-use-using
+		,-modernize-pass-by-value
 		,-performance-inefficient-string-concatenation
 		,-readability-avoid-const-params-in-decls
 		,-readability-else-after-return