[INTERNAL] sap.m.InputBase: Remove test page from acc pages
[INTERNAL] sap.m.InputBase: Remove test page from acc pages

Since the InputBase, does not have a dedicated accessibility
test page, the internal test page was added in the ACC test
application.
Since, all other input controls have a dedicated acc page,
there is no need to test the InputBase internal test page.

Change-Id: I8b7c2baadd86689af5137a995904b186d3373b11

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5