No-op signalr dotnet-ci builds

build/buildpipeline/linux.groovy

@@ -1,11 +1 @@
 @Library('dotnet-ci') _
-
-simpleNode('Ubuntu16.04', 'latest-or-auto-docker') {
-    stage ('Checking out source') {
-        checkout scm
-    }
-    stage ('Build') {
-        def environment = 'export SIGNALR_TESTS_VERBOSE=1'
-        sh "${environment} && ./build.sh --ci"
-    }
-}

build/buildpipeline/osx.groovy

@@ -1,11 +1,2 @@
 @Library('dotnet-ci') _
 
-simpleNode('OSX10.12','latest') {
-    stage ('Checking out source') {
-        checkout scm
-    }
-    stage ('Build') {
-        def environment = 'export SIGNALR_TESTS_VERBOSE=1'
-        sh "${environment} && ./build.sh --ci"
-    }
-}

build/buildpipeline/windows.groovy

@@ -1,12 +1,2 @@
 @Library('dotnet-ci') _
 
-// 'node' indicates to Jenkins that the enclosed block runs on a node that matches
-// the label 'windows-with-vs'
-simpleNode('Windows_NT','latest') {
-    stage ('Checking out source') {
-        checkout scm
-    }
-    stage ('Build') {
-        bat '.\\run.cmd -CI default-build'
-    }
-}