Remove appveyor/circleci files

appveyor.yml

@@ -1,7 +0,0 @@
-build_script:
-- C:\msys64\usr\bin\bash -lc "pacman --needed --noconfirm -Sy pacman-mirrors"
-- C:\msys64\usr\bin\bash -lc "pacman --noconfirm -Sy"
-- C:\msys64\usr\bin\bash -lc "pacman --noconfirm -S gcc git make"
-test_script:
-- C:\msys64\usr\bin\bash -lc "cd $APPVEYOR_BUILD_FOLDER && make -j 8 -k check"
-- C:\msys64\usr\bin\bash -lc "cd $APPVEYOR_BUILD_FOLDER && make -j 8 -k check LEGACY=1"

circle.yml

@@ -1,22 +0,0 @@
-general:
-  branches:
-    ignore:
-      - gh-pages
-
-dependencies:
-  cache_directories:
-    - "~/.kerl"
-    - "~/erlang"
-
-  pre:
-    - sudo apt-get update
-    - sudo apt-get install autoconf2.59 gcc parallel
-    - cd $HOME/bin && ln -s /usr/bin/autoconf2.59 autoconf
-    - cd $HOME/bin && ln -s /usr/bin/autoheader2.59 autoheader
-    - CI_OTP=OTP-18.2.1 make -f core/core.mk -f plugins/ci.mk ci-prepare:
-        timeout: 3600
-
-test:
-  override:
-    - source $HOME/erlang/OTP-18.2.1/activate && make -j 32 -k check
-    - source $HOME/erlang/OTP-18.2.1/activate && make -j 32 -k check LEGACY=1