Drop caching to avoid using stale dependency artefacts

appveyor.yml

@@ -11,27 +11,27 @@ install:
     - C:\cygwin64\setup-x86_64.exe -qgnNdO -l %CYG_CACHE% -R c:\cygwin64 -s http://cygwin.mirror.constant.com -P cmake,make,mingw64-x86_64-gcc-core
 
     # toxcore
-    - if not exist %CYG_CACHE%\toxcore.zip curl -L https://build.tox.chat/view/libtoxcore/job/libtoxcore-toktok_build_windows_x86-64_static_release/lastSuccessfulBuild/artifact/libtoxcore-toktok_build_windows_x86-64_static_release.zip -o %CYG_CACHE%\toxcore.zip
+    - curl -L https://build.tox.chat/view/libtoxcore/job/libtoxcore-toktok_build_windows_x86-64_static_release/lastSuccessfulBuild/artifact/libtoxcore-toktok_build_windows_x86-64_static_release.zip -o %CYG_CACHE%\toxcore.zip
     - unzip -o %CYG_CACHE%\toxcore.zip
 
     # openal
-    - if not exist %CYG_CACHE%\openal.zip curl -L  https://build.tox.chat/view/libopenal/job/libopenal_build_windows_x86-64_static_release/lastSuccessfulBuild/artifact/libopenal_build_windows_x86-64_static_release.zip -o %CYG_CACHE%\openal.zip
+    - curl -L  https://build.tox.chat/view/libopenal/job/libopenal_build_windows_x86-64_static_release/lastSuccessfulBuild/artifact/libopenal_build_windows_x86-64_static_release.zip -o %CYG_CACHE%\openal.zip
     - unzip -o %CYG_CACHE%\openal.zip
 
     # sodium
-    - if not exist %CYG_CACHE%\sodium.zip curl -L https://build.tox.chat/view/libsodium/job/libsodium_build_windows_x86-64_static_release/lastSuccessfulBuild/artifact/libsodium_build_windows_x86-64_static_release.zip -o %CYG_CACHE%\sodium.zip
+    - curl -L https://build.tox.chat/view/libsodium/job/libsodium_build_windows_x86-64_static_release/lastSuccessfulBuild/artifact/libsodium_build_windows_x86-64_static_release.zip -o %CYG_CACHE%\sodium.zip
     - unzip -o %CYG_CACHE%\sodium.zip
 
     # vpx
-    - if not exist %CYG_CACHE%\vpx.zip curl -L https://build.tox.chat/view/libvpx/job/libvpx_build_windows_x86-64_static_release/lastSuccessfulBuild/artifact/libvpx_build_windows_x86-64_static_release.zip -o %CYG_CACHE%\vpx.zip
+    - curl -L https://build.tox.chat/view/libvpx/job/libvpx_build_windows_x86-64_static_release/lastSuccessfulBuild/artifact/libvpx_build_windows_x86-64_static_release.zip -o %CYG_CACHE%\vpx.zip
     - unzip -o %CYG_CACHE%\vpx.zip
 
     # opus
-    - if not exist %CYG_CACHE%\opus.zip curl -L https://build.tox.chat/view/libopus/job/libopus_build_windows_x86-64_static_release/lastSuccessfulBuild/artifact/libopus_build_windows_x86-64_static_release.zip -o %CYG_CACHE%\opus.zip
+    - curl -L https://build.tox.chat/view/libopus/job/libopus_build_windows_x86-64_static_release/lastSuccessfulBuild/artifact/libopus_build_windows_x86-64_static_release.zip -o %CYG_CACHE%\opus.zip
     - unzip -o %CYG_CACHE%\opus.zip
 
     # filter_audio
-    - if not exist %CYG_CACHE%\filter_audio.zip curl -L https://build.tox.chat/view/libfilteraudio/job/libfilteraudio_build_windows_x86-64_static_release/lastSuccessfulBuild/artifact/libfilteraudio.zip -o %CYG_CACHE%\filter_audio.zip
+    - curl -L https://build.tox.chat/view/libfilteraudio/job/libfilteraudio_build_windows_x86-64_static_release/lastSuccessfulBuild/artifact/libfilteraudio.zip -o %CYG_CACHE%\filter_audio.zip
     - unzip -o %CYG_CACHE%\filter_audio.zip
 
 build_script: