diff --git a/editor/libeditor/HTMLEditorDataTransfer.cpp b/editor/libeditor/HTMLEditorDataTransfer.cpp
index 5b12f1b90e0f..80961e7387b3 100644
--- a/editor/libeditor/HTMLEditorDataTransfer.cpp
+++ b/editor/libeditor/HTMLEditorDataTransfer.cpp
@@ -1862,12 +1862,6 @@ HTMLEditor::InsertAsPlaintextQuotation(const nsAString& aQuotedText,
   return rv;
 }
 
-NS_IMETHODIMP
-HTMLEditor::StripCites()
-{
-  return TextEditor::StripCites();
-}
-
 NS_IMETHODIMP
 HTMLEditor::Rewrap(bool aRespectNewlines)
 {
diff --git a/editor/libeditor/InternetCiter.cpp b/editor/libeditor/InternetCiter.cpp
index 89b07c9d6eb9..9d9bbb944e75 100644
--- a/editor/libeditor/InternetCiter.cpp
+++ b/editor/libeditor/InternetCiter.cpp
@@ -67,59 +67,6 @@ InternetCiter::GetCiteString(const nsAString& aInString,
   return NS_OK;
 }
 
-nsresult
-InternetCiter::StripCitesAndLinebreaks(const nsAString& aInString,
-                                       nsAString& aOutString,
-                                       bool aLinebreaksToo,
-                                       int32_t* aCiteLevel)
-{
-  if (aCiteLevel) {
-    *aCiteLevel = 0;
-  }
-
-  aOutString.Truncate();
-  nsReadingIterator <char16_t> beginIter,endIter;
-  aInString.BeginReading(beginIter);
-  aInString.EndReading(endIter);
-  while (beginIter!= endIter) { // loop over lines
-    // Clear out cites first, at the beginning of the line:
-    int32_t thisLineCiteLevel = 0;
-    while (beginIter!= endIter &&
-           (*beginIter == gt || nsCRT::IsAsciiSpace(*beginIter))) {
-      if (*beginIter == gt) {
-        ++thisLineCiteLevel;
-      }
-      ++beginIter;
-    }
-    // Now copy characters until line end:
-    while (beginIter != endIter && (*beginIter != '\r' && *beginIter != '\n')) {
-      aOutString.Append(*beginIter);
-      ++beginIter;
-    }
-    if (aLinebreaksToo) {
-      aOutString.Append(char16_t(' '));
-    } else {
-      aOutString.Append(char16_t('\n'));    // DOM linebreaks, not NS_LINEBREAK
-    }
-    // Skip over any more consecutive linebreak-like characters:
-    while (beginIter != endIter && (*beginIter == '\r' || *beginIter == '\n')) {
-      ++beginIter;
-    }
-    // Done with this line -- update cite level
-    if (aCiteLevel && (thisLineCiteLevel > *aCiteLevel)) {
-      *aCiteLevel = thisLineCiteLevel;
-    }
-  }
-  return NS_OK;
-}
-
-nsresult
-InternetCiter::StripCites(const nsAString& aInString,
-                          nsAString& aOutString)
-{
-  return StripCitesAndLinebreaks(aInString, aOutString, false, 0);
-}
-
 static void AddCite(nsAString& aOutString, int32_t citeLevel)
 {
   for (int32_t i = 0; i < citeLevel; ++i) {
diff --git a/editor/libeditor/InternetCiter.h b/editor/libeditor/InternetCiter.h
index d1a861678bb7..32dc0e1637fc 100644
--- a/editor/libeditor/InternetCiter.h
+++ b/editor/libeditor/InternetCiter.h
@@ -20,19 +20,10 @@ public:
   static nsresult GetCiteString(const nsAString& aInString,
                                 nsAString& aOutString);
 
-  static nsresult StripCites(const nsAString& aInString,
-                             nsAString& aOutString);
-
   static nsresult Rewrap(const nsAString& aInString,
                          uint32_t aWrapCol, uint32_t aFirstLineOffset,
                          bool aRespectNewlines,
                          nsAString& aOutString);
-
-protected:
-  static nsresult StripCitesAndLinebreaks(const nsAString& aInString,
-                                          nsAString& aOutString,
-                                          bool aLinebreaksToo,
-                                          int32_t* aCiteLevel);
 };
 
 } // namespace mozilla
diff --git a/editor/libeditor/TextEditor.cpp b/editor/libeditor/TextEditor.cpp
index 4686d94d239c..17835b3d54bb 100644
--- a/editor/libeditor/TextEditor.cpp
+++ b/editor/libeditor/TextEditor.cpp
@@ -1998,33 +1998,6 @@ TextEditor::Rewrap(bool aRespectNewlines)
   return InsertTextWithQuotations(wrapped);
 }
 
-NS_IMETHODIMP
-TextEditor::StripCites()
-{
-  nsAutoString current;
-  bool isCollapsed;
-  nsresult rv = SharedOutputString(nsIDocumentEncoder::OutputFormatted,
-                                   &isCollapsed, current);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  nsString stripped;
-  rv = InternetCiter::StripCites(current, stripped);
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  if (isCollapsed) {
-    rv = SelectAllInternal();
-    if (NS_WARN_IF(NS_FAILED(rv))) {
-      return rv;
-    }
-  }
-
-  rv = InsertTextAsAction(stripped);
-  if (NS_WARN_IF(NS_FAILED(rv))) {
-    return rv;
-  }
-  return NS_OK;
-}
-
 NS_IMETHODIMP
 TextEditor::GetEmbeddedObjects(nsIArray** aNodeList)
 {
diff --git a/editor/nsIEditorMailSupport.idl b/editor/nsIEditorMailSupport.idl
index c1961b1ab8db..1667fc2fc3bb 100644
--- a/editor/nsIEditorMailSupport.idl
+++ b/editor/nsIEditorMailSupport.idl
@@ -59,12 +59,6 @@ interface nsIEditorMailSupport : nsISupports
    */
   void rewrap(in boolean aRespectNewlines);
 
-  /**
-   * Strip any citations in the selected part of the document.
-   */
-  void stripCites();
-
-
   /**
    * Get a list of IMG and OBJECT tags in the current document.
    */