See #375. Remove redundant PATH changes in appveyor.yml for Windows CI

appveyor.yml

@@ -100,9 +100,6 @@ install:
   # - php composer.phar global require fabpot/php-cs-fixer
   # - where php-cs-fixer
 
-  - echo %PATH%
-
-
 build_script:
 
   - cd %APPVEYOR_BUILD_FOLDER%
@@ -110,9 +107,5 @@ build_script:
   - apm install linter atom-typescript language-marko language-tss language-html-swig
   # Show current PATH
   - echo %PATH%
-  - SET PATH=%LOCALAPPDATA%\atom\bin;%PATH%
-  - SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%
-  - SET PATH=C:\\Ruby193\\bin;%PATH%
-  - echo %PATH%
   # Run tests on package
   - apm test --one --path %LOCALAPPDATA%/atom/bin/atom.cmd