Remove chainercv CI configs

.pfnci/config.pbtxt

@@ -107,52 +107,6 @@ configs {
   }
 }
 
-# Nightly wheels for ChainerCV tests
-configs {
-  key: "cupy.wheel.nightly"
-  value {
-    requirement {
-      cpu: 2
-      memory: 12
-    }
-    time_limit {
-      seconds: 1800
-    }
-    command: "sh .pfnci/wheel_nightly.sh"
-  }
-}
-
-# Python 2 tests are disabled in the master branch, but configs can be removed
-# only after removing web hooks.
-# TODO(niboshi): Completely remove them after discontinuing v6 series.
-configs {
-  key: "cupy.py2.cv.gpu"
-  value {
-    command: "true"
-  }
-}
-configs {
-  key: "cupy.py2.cv.examples"
-  value {
-    command: "true"
-  }
-}
-
-# ChainerCV's tests are disabled in the master branch, but configs can be removed
-# only after removing web hooks.
-configs {
-  key: "cupy.py3.cv.gpu"
-  value {
-    command: "true"
-  }
-}
-configs {
-  key: "cupy.py3.cv.examples"
-  value {
-    command: "true"
-  }
-}
-
 # ROCm build test
 configs {
   key: "cupy.py37.amd"