Remove useless pip argument

amos402 · amos402 · commit aced26890300 · 2020-07-31T00:04:04.000+08:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -40,7 +40,7 @@ init:
 install:
   - python -m pip install -U pip
   - pip install --upgrade -r requirements.txt --quiet
-  - pip install install pycparser --quiet
+  - pip install pycparser --quiet
 
   # Install OpenCover. Can't put on `packages.config`, not Mono compatible
   - .\tools\nuget\nuget.exe install OpenCover -OutputDirectory packages -Verbosity quiet
