IAccessible2: revert some bounds-checking changes again

...that were introduced with c23ab5eaed "Integrate
branch of IAccessible2" but broke JunitTest_sc_unoapi, which expects calls to
getCharacterAttributes and getIndexAtPoint to actually fail for out-of-bounds
arguments.  The above commit does not make it obvious why those changes were
actually made.

Change-Id: I3492c3e6a49d68885df1206e9368f4483c0dc4f9

editeng/source/accessibility/AccessibleEditableTextPara.cxx

@@ -1381,10 +1381,6 @@ namespace accessibility
         EBulletInfo aBulletInfo = rCacheTF.GetBulletInfo( static_cast< sal_uInt16 >(GetParagraphIndex()) );
         if (aBulletInfo.bVisible)
             nIndex += aBulletInfo.aText.getLength();
-        if (nIndex != 0 && nIndex >= getCharacterCount())
-            nIndex = getCharacterCount()-1;
-        //
-        if (nIndex != 0)
         CheckIndex(nIndex); // may throw IndexOutOfBoundsException
 
         bool bSupplementalMode = false;
@@ -1534,9 +1530,6 @@ namespace accessibility
 
         SolarMutexGuard aGuard;
 
-        if ((rPoint.X <= 0) && (rPoint.Y <= 0))
-            return 0;
-
         sal_Int32 nPara;
         sal_uInt16 nIndex;