Revert "emacsPackages.dap-mode: fix build"

This reverts commit fe5312cd44.

To make this fix reach users sooner, we revert it on the staging-next
branch and reapply it to the master branch.

pkgs/applications/editors/emacs/elisp-packages/melpa-packages.nix

@@ -982,19 +982,14 @@ let
 
         cssh = ignoreCompilationError super.cssh; # elisp error
 
-        dap-mode = super.dap-mode.overrideAttrs (
-          finalAttrs: previousAttrs: {
-            # empty file causing native-compiler-error-empty-byte
-            preBuild =
-              if lib.versionOlder finalAttrs.version "20250131.1624" then
-                ''
-                  rm --verbose dapui.el
-                ''
-                + previousAttrs.preBuild or ""
-              else
-                previousAttrs.preBuild or null;
-          }
-        );
+        dap-mode = super.dap-mode.overrideAttrs (old: {
+          # empty file causing native-compiler-error-empty-byte
+          preBuild =
+            ''
+              rm --verbose dapui.el
+            ''
+            + old.preBuild or "";
+        });
 
         db-pg = ignoreCompilationError super.db-pg; # elisp error