[orca] Use official footnote role rather than our temporary one

[Joanmarie Diggs <joanied src gnome org>]

commit 5c3633b4dff48925165d0528add34a74b6c6209c
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Fri Feb 28 15:00:05 2020 +0100

    Use official footnote role rather than our temporary one
    
    The footnote role was added to AT-SPI2 in version 2.26, and Orca's
    minimum required version of AT-SPI2 is 2.26. Thus there is no longer
    a need for a special role in Orca.

 src/orca/formatting.py        | 2 +-
 src/orca/generator.py         | 4 ----
 src/orca/object_properties.py | 6 ------
 3 files changed, 1 insertion(+), 11 deletions(-)
---
diff --git a/src/orca/formatting.py b/src/orca/formatting.py
index 22ce285e5..8e193a50e 100644
--- a/src/orca/formatting.py
+++ b/src/orca/formatting.py
@@ -243,7 +243,7 @@ formatting = {
             'basicWhereAmI': 'labelOrName + readOnly + textRole + (textContent or placeholderText) + 
anyTextSelection + required + pause + invalid + ' + MNEMONIC,
             'detailedWhereAmI': 'labelOrName + readOnly + textRole + (textContentWithAttributes or 
placeholderText) + anyTextSelection + required + pause + invalid + ' + MNEMONIC,
             },
-        'ROLE_FOOTNOTE': {
+        pyatspi.ROLE_FOOTNOTE: {
             'unfocused': 'labelOrName + roleName + pause + currentLineText + allTextSelection',
             },
         pyatspi.ROLE_FOOTER: {
diff --git a/src/orca/generator.py b/src/orca/generator.py
index fc529864a..c7cbbc950 100644
--- a/src/orca/generator.py
+++ b/src/orca/generator.py
@@ -1220,8 +1220,6 @@ class Generator:
             if self._script.utilities.isMathTableRow(obj):
                 return 'ROLE_MATH_TABLE_ROW'
         if self._script.utilities.isDPub(obj):
-            if self._script.utilities.isDPubFootnote(obj):
-                return 'ROLE_FOOTNOTE'
             if self._script.utilities.isLandmark(obj):
                 return 'ROLE_DPUB_LANDMARK'
             if obj.getRole() == pyatspi.ROLE_SECTION:
@@ -1363,8 +1361,6 @@ class Generator:
             else:
                 if self._script.utilities.isDPubCover(obj):
                     return object_properties.ROLE_COVER
-                if self._script.utilities.isDPubFootnote(obj):
-                    return object_properties.ROLE_FOOTNOTE
                 if self._script.utilities.isDPubPagebreak(obj):
                     return object_properties.ROLE_PAGEBREAK
                 if self._script.utilities.isDPubSubtitle(obj):
diff --git a/src/orca/object_properties.py b/src/orca/object_properties.py
index 5202f4eba..978cb6205 100644
--- a/src/orca/object_properties.py
+++ b/src/orca/object_properties.py
@@ -242,12 +242,6 @@ ROLE_ERRATA = C_("role", "errata")
 # https://w3c.github.io/dpub-aria/#doc-example
 ROLE_EXAMPLE = C_("role", "example")
 
-# Translators: This string should be treated as a role describing an object.
-# Examples of roles include "checkbox", "radio button", "paragraph", and "link."
-# This role refers to a single footnote in a digitally-published document.
-# https://w3c.github.io/dpub-aria/#doc-footnote
-ROLE_FOOTNOTE = C_("role", "footnote")
-
 # Translators: This string should be treated as a role describing an object.
 # Examples of roles include "checkbox", "radio button", "paragraph", and "link."
 # This role refers to the foreword in a digitally-published document.