debug: do not send breakpoints like crazy

fixes #39666

src/vs/workbench/parts/debug/electron-browser/debugService.ts

@@ -1238,8 +1238,11 @@ export class DebugService implements debug.IDebugService {
 	}
 
 	private onFileChanges(fileChangesEvent: FileChangesEvent): void {
-		this.model.removeBreakpoints(this.model.getBreakpoints().filter(bp =>
-			fileChangesEvent.contains(bp.uri, FileChangeType.DELETED)));
+		const toRemove = this.model.getBreakpoints().filter(bp =>
+			fileChangesEvent.contains(bp.uri, FileChangeType.DELETED));
+		if (toRemove.length) {
+			this.model.removeBreakpoints(toRemove);
+		}
 
 		fileChangesEvent.getUpdated().forEach(event => {
 			if (this.breakpointsToSendOnResourceSaved.has(event.resource.toString())) {