Remove the relative comparison operators on LogLevel

Summary: MSVC, GCC, and Clang define the relative comparison operators by default on `enum class` values, however under MSVC defining them explicitly causes the compiler to fail to resolve which operator to use, so just remove them entirely, as they aren't needed.

Reviewed By: simpkins

Differential Revision: D5259835

fbshipit-source-id: 1b91db5de0fc47320daabfdd7132ae910887ff0f

folly/experimental/logging/LogLevel.h

@@ -98,22 +98,6 @@ inline LogLevel& operator-=(LogLevel& level, uint32_t value) {
   return level;
 }
 
-/*
- * Comparisons between LogLevel values
- */
-inline bool operator<=(LogLevel a, LogLevel b) {
-  return static_cast<uint32_t>(a) <= static_cast<uint32_t>(b);
-}
-inline bool operator<(LogLevel a, LogLevel b) {
-  return static_cast<uint32_t>(a) < static_cast<uint32_t>(b);
-}
-inline bool operator>=(LogLevel a, LogLevel b) {
-  return static_cast<uint32_t>(a) >= static_cast<uint32_t>(b);
-}
-inline bool operator>(LogLevel a, LogLevel b) {
-  return static_cast<uint32_t>(a) > static_cast<uint32_t>(b);
-}
-
 /**
  * Construct a LogLevel from a string name.
  */