Remove unused editing related member functions from WebViewClient

LayoutTests/editing/deleting/delete-ligature-002-expected.txt

Index: LayoutTests/editing/deleting/delete-ligature-002-expected.txt
diff --git a/LayoutTests/editing/deleting/delete-ligature-002-expected.txt b/LayoutTests/editing/deleting/delete-ligature-002-expected.txt
index c30680089e0fb929f78b0d6ccf75b40d45375838..b4b35d3d701622c5f81d6310a0394628da81f659 100644
--- a/LayoutTests/editing/deleting/delete-ligature-002-expected.txt
+++ b/LayoutTests/editing/deleting/delete-ligature-002-expected.txt
@@ -1,15 +1,10 @@
-EDITING DELEGATE: shouldBeginEditingInDOMRange:range from 0 of DIV > BODY > HTML > #document to 0 of DIV > BODY > HTML > #document
-EDITING DELEGATE: webViewDidBeginEditing:WebViewDidBeginEditingNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 0 of DIV > BODY > HTML > #document to 0 of DIV > BODY > HTML > #document toDOMRange:range from 1 of #text > DIV > BODY > HTML > #document to 1 of #text > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 1 of #text > DIV > BODY > HTML > #document to 1 of #text > DIV > BODY > HTML > #document toDOMRange:range from 2 of #text > DIV > BODY > HTML > #document to 2 of #text > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldDeleteDOMRange:range from 1 of #text > DIV > BODY > HTML > #document to 2 of #text > DIV > BODY > HTML > #document
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification