electron_33-bin: mark as insecure because it's EOL, electron-source.electron_33: remove as it's EOL (#397918)

pkgs/development/tools/electron/binary/generic.nix

@@ -58,7 +58,7 @@ let
     ];
     sourceProvenance = with sourceTypes; [ binaryNativeCode ];
     # https://www.electronjs.org/docs/latest/tutorial/electron-timelines
-    knownVulnerabilities = optional (versionOlder version "33.0.0") "Electron version ${version} is EOL";
+    knownVulnerabilities = optional (versionOlder version "34.0.0") "Electron version ${version} is EOL";
   };
 
   fetcher =

pkgs/top-level/all-packages.nix

@@ -7827,11 +7827,7 @@ with pkgs;
     ;
 
   electron_32 = electron_32-bin;
-  electron_33 =
-    if lib.meta.availableOn stdenv.hostPlatform electron-source.electron_33 then
-      electron-source.electron_33
-    else
-      electron_33-bin;
+  electron_33 = electron_33-bin;
   electron_34 =
     if lib.meta.availableOn stdenv.hostPlatform electron-source.electron_34 then
       electron-source.electron_34