Bug 1387570 - remove access to the com.apple.cache_delete mach service from content processes; r=haik

MozReview-Commit-ID: LoB1rx5DoV5

--HG--
extra : rebase_source : 7721399376e8ae7e6f41581681b61e92e20f2b21

security/sandbox/mac/SandboxPolicies.h

@@ -189,8 +189,7 @@ static const char contentSandboxRules[] = R"(
       (global-name "com.apple.audio.coreaudiod")
       (global-name "com.apple.audio.audiohald")
       (global-name "com.apple.SystemConfiguration.configd")
-      (global-name "com.apple.iconservices")
-      (global-name "com.apple.cache_delete"))
+      (global-name "com.apple.iconservices"))
 
 ; bug 1376163
   (if (>= macosMinorVersion 13)