logd: drop can_read_security_logs

This has become useless after refactoring; we instead ensure that the
LOG_ID_SECURITY bit isn't set in log_mask, instead of having this
additional check.

Test: logging unit tests
Change-Id: Id47b288d056ebf2b5bd26be94006f17c24fafd31
diff --git a/logd/LogBufferTest.h b/logd/LogBufferTest.h
index 1659f12..f91a1b5 100644
--- a/logd/LogBufferTest.h
+++ b/logd/LogBufferTest.h
@@ -45,7 +45,7 @@
 class TestWriter : public LogWriter {
   public:
     TestWriter(std::vector<LogMessage>* msgs, bool* released)
-        : LogWriter(0, true, true), msgs_(msgs), released_(released) {}
+        : LogWriter(0, true), msgs_(msgs), released_(released) {}
     bool Write(const logger_entry& entry, const char* message) override {
         msgs_->emplace_back(LogMessage{entry, std::string(message, entry.len), false});
         return true;