diff --git a/.upgrade.yml b/.upgrade.yml
deleted file mode 100644
index 2087063..0000000
--- a/.upgrade.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-mappings:
-  EnvironmentCheck: SilverStripe\EnvironmentCheck\EnvironmentCheck
-  EnvironmentChecker: SilverStripe\EnvironmentCheck\EnvironmentChecker
-  EnvironmentCheckSuite: SilverStripe\EnvironmentCheck\EnvironmentCheckSuite
-  EnvironmentCheckSuiteResult: SilverStripe\EnvironmentCheck\EnvironmentCheckSuiteResult
-  DatabaseCheck: SilverStripe\EnvironmentCheck\Checks\DatabaseCheck
-  ExternalURLCheck: SilverStripe\EnvironmentCheck\Checks\ExternalURLCheck
-  FileAccessibilityAndValidationCheck: SilverStripe\EnvironmentCheck\Checks\FileAccessibilityAndValidationCheck
-  FileAgeCheck: SilverStripe\EnvironmentCheck\Checks\FileAgeCheck
-  FileWriteableCheck: SilverStripe\EnvironmentCheck\Checks\FileWriteableCheck
-  HasClassCheck: SilverStripe\EnvironmentCheck\Checks\HasClassCheck
-  HasFunctionCheck: SilverStripe\EnvironmentCheck\Checks\HasFunctionCheck
-  SMTPConnectCheck: SilverStripe\EnvironmentCheck\Checks\SMTPConnectCheck
-  SolrIndexCheck: SilverStripe\EnvironmentCheck\Checks\SolrIndexCheck
-  URLCheck: SilverStripe\EnvironmentCheck\Checks\URLCheck
-  DevCheckController: SilverStripe\EnvironmentCheck\Controllers\DevCheckController
-  DevHealthController: SilverStripe\EnvironmentCheck\Controllers\DevHealthController
-  EnvironmentCheckerTest: SilverStripe\EnvironmentCheck\Tests\EnvironmentCheckerTest
-  EnvironmentCheckerTest_CheckNoErrors: SilverStripe\EnvironmentCheck\Tests\EnvironmentCheckerTest_CheckNoErrors
-  EnvironmentCheckerTest_CheckWarnings: SilverStripe\EnvironmentCheck\Tests\EnvironmentCheckerTest_CheckWarnings
-  EnvironmentCheckerTest_CheckErrors: SilverStripe\EnvironmentCheck\Tests\EnvironmentCheckerTest_CheckErrors
-  DatabaseCheckTest: SilverStripe\EnvironmentCheck\Tests\Checks\DatabaseCheckTest
-  ExternalURLCheckTest: SilverStripe\EnvironmentCheck\Tests\Checks\ExternalURLCheckTest
-  FileWritableCheckTest: SilverStripe\EnvironmentCheck\Tests\Checks\FileWritableCheckTest
-  HasClassCheckTest: SilverStripe\EnvironmentCheck\Tests\Checks\HasClassCheckTest
-  HasFunctionCheckTest: SilverStripe\EnvironmentCheck\Tests\Checks\HasFunctionCheckTest
-  URLCheckTest: SilverStripe\EnvironmentCheck\Tests\Checks\URLCheckTest
-  DevCheckControllerTest: SilverStripe\EnvironmentCheck\Tests\Controllers\DevCheckControllerTest
-  DevHealthControllerTest: SilverStripe\EnvironmentCheck\Tests\Controllers\DevHealthControllerTest