--- a/devtools/client/sourceeditor/codemirror/old-debugger.css
+++ b/devtools/client/sourceeditor/codemirror/old-debugger.css
@@ -1,17 +1,15 @@
 :root {
   --breakpoint-background: url("chrome://devtools/skin/images/breakpoint.svg#light");
-  --breakpoint-hover-background: url("chrome://devtools/skin/images/breakpoint.svg#light-hover");
   --breakpoint-conditional-background: url("chrome://devtools/skin/images/breakpoint.svg#light-conditional");
 }
 
 .theme-dark:root {
   --breakpoint-background: url("chrome://devtools/skin/images/breakpoint.svg#dark");
-  --breakpoint-hover-background: url("chrome://devtools/skin/images/breakpoint.svg#dark-hover");
   --breakpoint-conditional-background: url("chrome://devtools/skin/images/breakpoint.svg#dark-conditional");
 }
 
 .breakpoint .CodeMirror-linenumber:before {
   background-image: var(--breakpoint-background) !important;
 }
 
 .conditional .CodeMirror-linenumber:before {