Remove unused CSS files related to Zen theme

src/browser/themes/shared/browser-shared-css.patch

@@ -2,16 +2,6 @@ diff --git a/browser/themes/shared/browser-shared.css b/browser/themes/shared/br
 index f2171eb033a1143870f4708c63f565fabb535c4b..a21631e56e74d5d1887554d2752a612887ed20c5 100644
 --- a/browser/themes/shared/browser-shared.css
 +++ b/browser/themes/shared/browser-shared.css
-@@ -27,6 +27,9 @@
- @import url("chrome://browser/skin/UITour.css");
- @import url("chrome://browser/skin/formautofill-notification.css");
- 
-+@import url("chrome://global/skin/zen-global-shared.css");
-+@import url("chrome://browser/skin/zen-browser-shared.css");
-+
- @namespace html url("http://www.w3.org/1999/xhtml");
- 
- :root,
 @@ -73,7 +76,7 @@ body {
    --short-notification-gradient: #9059FF;
  

src/browser/themes/shared/sidebar-css.patch

@@ -1,13 +0,0 @@
-diff --git a/browser/themes/shared/sidebar.css b/browser/themes/shared/sidebar.css
-index a9b3886e1ff4a36c5bd161985719f66a41d95458..242b3ad30785bed1937d9bf99e8abc7427111541 100644
---- a/browser/themes/shared/sidebar.css
-+++ b/browser/themes/shared/sidebar.css
-@@ -2,6 +2,8 @@
-  * License, v. 2.0. If a copy of the MPL was not distributed with this
-  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
- 
-+@import url("chrome://browser/skin/zen-sidebar.css");
-+
- @namespace html url("http://www.w3.org/1999/xhtml");
- 
- :root {

src/toolkit/content/jar-mn.patch

@@ -1,12 +0,0 @@
-diff --git a/toolkit/content/jar.mn b/toolkit/content/jar.mn
-index 8b18c945253d00603891cc5f0b989476318e219c..c5368eec8d9a760c19a827fe7a4b9afb4b702976 100644
---- a/toolkit/content/jar.mn
-+++ b/toolkit/content/jar.mn
-@@ -143,3 +143,7 @@ toolkit.jar:
- # Third party files
-    content/global/third_party/d3/d3.js                (/third_party/js/d3/d3.js)
-    content/global/third_party/cfworker/json-schema.js (/third_party/js/cfworker/json-schema.js)
-+
-+# Zen modules
-+   content/global/zen-xul.css
-+   content/global/zen-fullscreen-override.css

src/toolkit/content/xul-css.patch

@@ -2,15 +2,6 @@ diff --git a/toolkit/content/xul.css b/toolkit/content/xul.css
 index 908132d598083dd43ee62940f4bac84e49238c92..eb7edf3870032fe796b3fa676de96e1dbb5eea85 100644
 --- a/toolkit/content/xul.css
 +++ b/toolkit/content/xul.css
-@@ -12,6 +12,8 @@
-  * browser.css.
-  */
- 
-+@import url("chrome://global/content/zen-xul.css");
-+
- @namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* set default namespace to XUL */
- @namespace html url("http://www.w3.org/1999/xhtml"); /* namespace for HTML elements */
- 
 @@ -485,7 +487,8 @@ deck > *|*:not(:-moz-native-anonymous) {
  }
  

src/toolkit/themes/shared/in-content/common-shared-css.patch

@@ -2,15 +2,6 @@ diff --git a/toolkit/themes/shared/in-content/common-shared.css b/toolkit/themes
 index 2b59a0604b4bfefd3bdcfdb9a3964937e9699114..92705331fa12d88e9091310c1f527562931e7132 100644
 --- a/toolkit/themes/shared/in-content/common-shared.css
 +++ b/toolkit/themes/shared/in-content/common-shared.css
-@@ -5,6 +5,8 @@
- @import url("chrome://global/skin/design-system/tokens-brand.css");
- @import url("chrome://global/skin/design-system/text-and-typography.css");
- 
-+@import url("chrome://global/skin/in-content/zen-common-shared.css");
-+
- @namespace html "http://www.w3.org/1999/xhtml";
- @namespace xul "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
- 
 @@ -63,7 +65,7 @@
    --in-content-table-border-color: var(--in-content-box-border-color);
    --in-content-table-header-background: var(--in-content-primary-button-background);

src/toolkit/themes/shared/popup-css.patch

@@ -2,15 +2,6 @@ diff --git a/toolkit/themes/shared/popup.css b/toolkit/themes/shared/popup.css
 index ed230860215c734e6fb903b3660d0c679043e3f3..348436a56cecdf101da66cdec9d64f1bb851ba4d 100644
 --- a/toolkit/themes/shared/popup.css
 +++ b/toolkit/themes/shared/popup.css
-@@ -2,6 +2,8 @@
-  * License, v. 2.0. If a copy of the MPL was not distributed with this
-  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
- 
-+@import url("zen-popup.css");
-+
- @namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
- 
- /* ::::: menupopup ::::: */
 @@ -13,16 +15,16 @@ panel {
    color-scheme: light dark;