refactor: remove greenkeeper configuration

package.json

@@ -93,24 +93,5 @@
 	},
 	"release": {
 		"extends": "@peakfijn/config-release"
-	},
-	"greenkeeper": {
-		"commitMessages": {
-			"initialBadge": "documentation: add greenkeeper badge",
-			"initialDependencies": "chore: update dependencies",
-			"initialBranches": "chore: whitelist greenkeeper branches",
-			"dependencyUpdate": "refactor: upgrade ${dependency} to version ${version}",
-			"devDependencyUpdate": "refactor: upgrade ${dependency} to version ${version}",
-			"dependencyPin": "fix: freeze ${dependency} to ${oldVersion}",
-			"devDependencyPin": "fix: freeze ${dependency} to ${oldVersion}"
-		},
-		"prTitles": {
-			"initialPR": "refactor: upgrade all dependencies to enable greenkeeper",
-			"initialPrBadge": "documentation: add greenkeeper badge",
-			"initialPrBadgeOnly": "documentation: add greenkeeper badge",
-			"initialSubgroupPR": "refactor(${group}): upgrade ${dependency} to version ${version}",
-			"basicPR": "refactor: upgrade ${dependency} to version ${version}",
-			"groupPR": "refactor(${group}): upgrade ${dependency} to version ${version}"
-		}
 	}
 }