Revert "Add LOG_SILENT LogPriority"

This reverts commit 9a40a107f8.

Reason for revert: Elfin has stricter compiler settings than other platforms and breaks when this is checked in.

Change-Id: I169a43ff6b9d90101276690b1d3aae7865946eb0

libwvdrmengine/cdm/util/include/log.h

@@ -14,15 +14,11 @@ namespace wvcdm {
 // Simple logging class. The implementation is platform dependent.
 
 typedef enum {
-  // This log level should only be used for |g_cutoff|, in order to silence all
-  // logging. It should never be passed to |Log()| as a log level.
-  LOG_SILENT = -1,
-
-  LOG_ERROR = 0,
-  LOG_WARN = 1,
-  LOG_INFO = 2,
-  LOG_DEBUG = 3,
-  LOG_VERBOSE = 4,
+  LOG_ERROR,
+  LOG_WARN,
+  LOG_INFO,
+  LOG_DEBUG,
+  LOG_VERBOSE
 } LogPriority;
 
 extern LogPriority g_cutoff;