chore(CI): Remove keg-only install of git in github action runner

Doesn't have a formula present, but is still linked to /usr/, so
conflicts with installing or upgrading git from out brewfile. Removing
it gives us a more standard environment, and allows us to test our
brewfile unmodified.

Fixes run failures like
https://github.com/qTox/qTox/runs/6111786910?check_suite_focus=true

.github/workflows/build-test-deploy.yaml

@@ -512,6 +512,8 @@ jobs:
       contents: write
     steps:
       - uses: actions/checkout@v3
+      - name: Remove keg-only git install
+        run: brew remove git@2.35.1
       - name: Homebrew dependencies to build dependencies
         run: brew upgrade && brew bundle --file ./osx/Brewfile-DepBuildDeps
       - name: Build dependencies
@@ -556,6 +558,8 @@ jobs:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v3
+      - name: Remove keg-only git install
+        run: brew remove git@2.35.1
       - name: Homebrew
         run: brew upgrade && brew bundle --file ./osx/Brewfile
       - name: Install toxcore and toxext