Web Inspector: remove unused test hook setInspectorResourcesDataSizeLimits

Web Inspector: remove unused test hook setInspectorResourcesDataSizeLimits
https://bugs.webkit.org/show_bug.cgi?id=131268

Reviewed by Timothy Hatcher.

Source/WebCore:

This was used in the old inspector frontend tests for the Network panel.
It's no longer used by any tests or frontend code.

* WebCore.exp.in: Remove symbols.
* inspector/InspectorController.cpp:
(WebCore::InspectorController::setInspectorResourcesDataSizeLimits): Deleted.
* inspector/InspectorController.h:
* inspector/InspectorResourceAgent.cpp:
(WebCore::InspectorResourceAgent::setResourcesDataSizeLimitsFromInternals): Deleted.
* inspector/InspectorResourceAgent.h:
* inspector/NetworkResourcesData.cpp:
(WebCore::NetworkResourcesData::setResourcesDataSizeLimits): Deleted.
* inspector/NetworkResourcesData.h:
* testing/Internals.cpp:
(WebCore::Internals::setInspectorResourcesDataSizeLimits): Deleted.
* testing/Internals.h:
* testing/Internals.idl:

Source/WebKit:

* WebKit.vcxproj/WebKitExportGenerator/WebKitExports.def.in: Remove symbols.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@166849 268f45cc-cd09-0410-ab3c-d52691b4dbfc