fix other firefox installs, revert test file

Author: hsubox76

.github/workflows/test-changed-auth.yml

@@ -38,7 +38,10 @@ jobs:
         run: xvfb-run yarn test:changed auth
   test-firefox:
     name: Test Auth on Firefox If Changed
-    runs-on: ubuntu-latest
+    # Whatever version of Firefox comes with 22.04 is causing Firefox
+    # startup to hang when launched by karma. Need to look further into
+    # why.
+    runs-on: ubuntu-20.04
 
     steps:
       - name: install Firefox stable

.github/workflows/test-changed-firestore.yml

@@ -34,6 +34,9 @@ jobs:
 
   test-firefox:
     name: Test Firestore on Firefox If Changed
+    # Whatever version of Firefox comes with 22.04 is causing Firefox
+    # startup to hang when launched by karma. Need to look further into
+    # why.
     runs-on: ubuntu-20.04
 
     steps:

.github/workflows/test-changed.yml

@@ -34,7 +34,10 @@ jobs:
 
   test-firefox:
     name: Test Packages With Changed Files in Firefox
-    runs-on: ubuntu-latest
+    # Whatever version of Firefox comes with 22.04 is causing Firefox
+    # startup to hang when launched by karma. Need to look further into
+    # why.
+    runs-on: ubuntu-20.04
 
     steps:
       - name: Checkout Repo

packages/firestore/src/index/directional_index_byte_encoder.ts

@@ -17,8 +17,6 @@
 
 import { ByteString } from '../util/byte_string';
 
-// Trigger Firestore CI tests
-
 /** An index value encoder.  */
 export interface DirectionalIndexByteEncoder {
   // Note: This code is copied from the backend. Code that is not used by