Remove SPS profiler.

- Conditionals and code blocks. (MOZ_ENABLE_PROFILER_SPS)
- Stub out several profiler-only functions.

layout/base/nsPresShell.cpp

@@ -4064,23 +4064,6 @@ PresShell::FlushPendingNotifications(mozilla::ChangesToFlush aFlush)
    */
   mozFlushType flushType = aFlush.mFlushType;
 
-#ifdef MOZ_ENABLE_PROFILER_SPS
-  static const char flushTypeNames[][20] = {
-    "Content",
-    "ContentAndNotify",
-    "Style",
-    "InterruptibleLayout",
-    "Layout",
-    "Display"
-  };
-
-  // Make sure that we don't miss things added to mozFlushType!
-  MOZ_ASSERT(static_cast<uint32_t>(flushType) <= ArrayLength(flushTypeNames));
-
-  PROFILER_LABEL_PRINTF("PresShell", "Flush",
-    js::ProfileEntry::Category::GRAPHICS, "(Flush_%s)", flushTypeNames[flushType - 1]);
-#endif
-
 #ifdef ACCESSIBILITY
 #ifdef DEBUG
   nsAccessibilityService* accService = GetAccService();