Refactor ReactBridgeStartupData to work with QPL and remove unused fi…

…elds

Summary:
This class contains metrics about RN bridge startup that was being sent via FBAnalytics.

This diff refactors out any timespans being collected into a separate method. This refactor is NOT ENOUGH to format the data into a format QPL accepts. I still need to refactor these timespans into _start and _end points for QPL points to work correctly. This diff is a starting point.

Reviewed By: ejanzer

Differential Revision: D10466982

fbshipit-source-id: 4bc1159c4e53328f2252a8c606c8d6ff8d657489

React/Base/RCTPerformanceLogger.h

@@ -19,10 +19,8 @@ typedef NS_ENUM(NSUInteger, RCTPLTag) {
   RCTPLNativeModuleInit,
   RCTPLNativeModuleMainThread,
   RCTPLNativeModulePrepareConfig,
-  RCTPLNativeModuleInjectConfig,
   RCTPLNativeModuleMainThreadUsesCount,
   RCTPLJSCWrapperOpenLibrary,
-  RCTPLJSCExecutorSetup,
   RCTPLBridgeStartup,
   RCTPLTTI,
   RCTPLBundleSize,