Revert "add code to support node 8"

This reverts commit 13e645c.

Author: mansona

src/get-start-and-end-commands.js

@@ -19,9 +19,6 @@ const nodeModulesIgnore = `
 /node_modules/
 `;
 
-// remove when node 8 is dropped
-const lastNode8Version = '3.16';
-
 module.exports = function getStartAndEndCommands({
   packageJson: { name: projectName },
   baseBlueprint,
@@ -50,7 +47,7 @@ module.exports = function getStartAndEndCommands({
     // first version that supports blueprints with versions
     // `-b [email protected]`
     // https://github.com/ember-cli/ember-cli/pull/8571
-    startRange = endRange = `>=3.11.0-beta.1 <${lastNode8Version}`;
+    startRange = endRange = '>=3.11.0-beta.1';
   }
 
   return {
@@ -175,7 +172,7 @@ function runEmberRemotely({
   let isGlimmer = blueprint.packageName === glimmerPackageName && blueprint.name === glimmerPackageName;
 
   if (isCustomBlueprint || isGlimmer) {
-    args = [`ember-cli@${lastNode8Version}`, ...args];
+    args = ['ember-cli', ...args];
     // args = ['-p', 'github:ember-cli/ember-cli#cfb9780', 'ember', 'new', projectName, `-dir=${directoryName}, '-sg', -sn', '-b', `${blueprint.packageName}@${blueprint.version}`];
   } else {
     args = ['-p', `ember-cli@${blueprint.version}`, 'ember', ...args];

test/unit/get-start-and-end-commands-test.js

@@ -254,7 +254,7 @@ describe(_getStartAndEndCommands, function() {
             name: blueprint,
             version: startVersion
           },
-          packageRange: '>=3.11.0-beta.1 <3.16'
+          packageRange: '>=3.11.0-beta.1'
         },
         endOptions: {
           baseBlueprint: {
@@ -265,7 +265,7 @@ describe(_getStartAndEndCommands, function() {
             name: blueprint,
             version: endVersion
           },
-          packageRange: '>=3.11.0-beta.1 <3.16'
+          packageRange: '>=3.11.0-beta.1'
         }
       });
     });
@@ -335,7 +335,7 @@ describe(_getStartAndEndCommands, function() {
 
       expect(npxStub.args).to.deep.equal([[
         [
-          `${packageName}@3.16`,
+          packageName,
           'new',
           projectName,
           '-sg',