fx115: Remove global.dtd includes and chromedir attribute

It only had `locale.dir`, which it looks like we can handle in different
ways now:

- CSS rules with `:-moz-locale-dir(ltr)`
- `let isLTR = document.documentElement.matches(":-moz-locale-dir(ltr)");`

chrome/content/scaffold/scaffold.xhtml

@@ -32,7 +32,6 @@
 
 
 <!DOCTYPE window [
-	<!ENTITY % globalDTD SYSTEM "chrome://global/locale/global.dtd"> %globalDTD;
 	<!ENTITY % standaloneDTD SYSTEM "chrome://zotero/locale/standalone.dtd" > %standaloneDTD;
 	<!ENTITY % editMenuOverlayDTD SYSTEM "chrome://zotero/locale/mozilla/editMenuOverlay.dtd" > %editMenuOverlayDTD;
 	<!ENTITY % brandDTD SYSTEM "chrome://branding/locale/brand.dtd" > %brandDTD;

chrome/content/zotero/note.xhtml

@@ -5,7 +5,6 @@
 <?xml-stylesheet href="chrome://zotero-platform/content/zotero.css" type="text/css"?>
 
 <!DOCTYPE window [
-	<!ENTITY % globalDTD SYSTEM "chrome://global/locale/global.dtd"> %globalDTD;
 	<!ENTITY % zoteroDTD SYSTEM "chrome://zotero/locale/zotero.dtd"> %zoteroDTD;
 ]>
 

chrome/content/zotero/preferences/preferences.xhtml

@@ -24,7 +24,6 @@
     ***** END LICENSE BLOCK *****
 -->
 <!DOCTYPE window [
-	<!ENTITY % globalDTD SYSTEM "chrome://global/locale/global.dtd"> %globalDTD;
 	<!ENTITY % editMenuOverlayDTD SYSTEM "chrome://zotero/locale/mozilla/editMenuOverlay.dtd" > %editMenuOverlayDTD;
 	<!ENTITY % zoteroDTD SYSTEM "chrome://zotero/locale/zotero.dtd"> %zoteroDTD;
 	<!ENTITY % preferencesDTD SYSTEM "chrome://zotero/locale/preferences.dtd"> %preferencesDTD;

chrome/content/zotero/reader.xhtml

@@ -6,7 +6,6 @@
 <?xml-stylesheet href="chrome://zotero-platform/content/zotero.css" type="text/css"?>
 
 <!DOCTYPE window [
-	<!ENTITY % globalDTD SYSTEM "chrome://global/locale/global.dtd"> %globalDTD;
 	<!ENTITY % editMenuOverlayDTD SYSTEM "chrome://zotero/locale/mozilla/editMenuOverlay.dtd" > %editMenuOverlayDTD;
 	<!ENTITY % standaloneDTD SYSTEM "chrome://zotero/locale/standalone.dtd" > %standaloneDTD;
 	<!ENTITY % zoteroDTD SYSTEM "chrome://zotero/locale/zotero.dtd"> %zoteroDTD;

chrome/content/zotero/standalone/basicViewer.xhtml

@@ -32,7 +32,6 @@
 <?xul-overlay href="chrome://zotero-platform/content/standalone/menuOverlay.xul"?>
 
 <!DOCTYPE window [
-	<!ENTITY % globalDTD SYSTEM "chrome://global/locale/global.dtd"> %globalDTD;
 	<!ENTITY % editMenuOverlayDTD SYSTEM "chrome://zotero/locale/mozilla/editMenuOverlay.dtd" > %editMenuOverlayDTD;
 	<!ENTITY % standaloneDTD SYSTEM "chrome://zotero/locale/standalone.dtd" > %standaloneDTD;
 	<!ENTITY % brandDTD SYSTEM "chrome://branding/locale/brand.dtd" > %brandDTD;

chrome/content/zotero/standalone/hiddenWindow.xhtml

@@ -29,7 +29,6 @@
 <?xul-overlay href="chrome://zotero-platform/content/standalone/menuOverlay.xul"?>
 
 <!DOCTYPE window [
-	<!ENTITY % globalDTD SYSTEM "chrome://global/locale/global.dtd"> %globalDTD;
 	<!ENTITY % standaloneDTD SYSTEM "chrome://zotero/locale/standalone.dtd" > %standaloneDTD;
 	<!ENTITY % brandDTD SYSTEM "chrome://branding/locale/brand.dtd" > %brandDTD;
 	<!ENTITY % zoteroDTD SYSTEM "chrome://zotero/locale/zotero.dtd"> %zoteroDTD;

chrome/content/zotero/zoteroPane.xhtml

@@ -35,7 +35,6 @@
 <?xml-stylesheet href="chrome://zotero-platform/content/zotero.css"?>
 
 <!DOCTYPE window [
-	<!ENTITY % globalDTD SYSTEM "chrome://global/locale/global.dtd"> %globalDTD;
 	<!ENTITY % standaloneDTD SYSTEM "chrome://zotero/locale/standalone.dtd" > %standaloneDTD;
 	<!ENTITY % editMenuOverlayDTD SYSTEM "chrome://zotero/locale/mozilla/editMenuOverlay.dtd" > %editMenuOverlayDTD;
 	<!ENTITY % brandDTD SYSTEM "chrome://branding/locale/brand.dtd" > %brandDTD;
@@ -893,8 +892,7 @@
 						<vbox id="zotero-pane"
 							onkeydown="ZoteroPane_Local.handleKeyDown(event, this.id)"
 							onkeyup="ZoteroPane_Local.handleKeyUp(event, this.id)"
-							onkeypress="ZoteroPane_Local.handleKeyPress(event)"
+							onkeypress="ZoteroPane_Local.handleKeyPress(event)">
-							chromedir="&locale.dir;">
 							
 							<vbox id="sync-reminder-container" collapsed="true" role="status">
 								<html:div id="sync-reminder-banner">