Bug 1129982 - remove unused profiler string. r=vp

browser/locales/en-US/chrome/browser/devtools/profiler.dtd

@@ -68,14 +68,6 @@
   -  for the options button. -->
 <!ENTITY profilerUI.options.tooltiptext "Configure performance preferences.">
 
-<!-- LOCALIZATION NOTE (profilerUI.invertTree): This is the label shown next to
-  -  a checkbox that inverts and un-inverts the profiler's call tree. -->
-<!ENTITY profilerUI.invertTree "Invert Call Tree">
-
-<!-- LOCALIZATION NOTE (profilerUI.flattenTree.tooltiptext): This is the tooltip
-  -  for the tree-flattening checkbox's label.  -->
-<!ENTITY profilerUI.flattenTree.tooltiptext "Inverting the call tree displays the profiled call paths starting from the youngest frames and expanding out to the older frames.">
-
 <!-- LOCALIZATION NOTE (profilerUI.invertTree): This is the label shown next to
   -  a checkbox that inverts and un-inverts the profiler's call tree. -->
 <!ENTITY profilerUI.invertTree             "Invert Call Tree">