Remove unused code

include/caosdb/value.h

@@ -63,11 +63,9 @@ public:
     return (this->wrapped->scalar_value_case() == ScalarValueCase::kStringValue) ||
            (this->wrapped->scalar_value_case() == ScalarValueCase::kSpecialValue &&
             this->wrapped->special_value() == ProtoSpecialValue::SPECIAL_VALUE_EMPTY_STRING);
-    return false;
   }
   [[nodiscard]] inline auto AsString() const noexcept -> const std::string & {
     return this->wrapped->string_value();
-    ;
   }
 
   [[nodiscard]] inline auto IsDouble() const noexcept -> bool {