Update CODEOWNERS (Azure#2423)

Remove Jeffrey Richter as code owner

Author: JeffreyRichter

.github/CODEOWNERS

@@ -40,12 +40,12 @@
 # AzureSDKOwners: @heaths
 # ServiceLabel: %Azure.Core
 # PRLabel: %Azure.Core
-/sdk/core/               @heaths @RickWinter @JeffreyRichter @LarryOsterman
+/sdk/core/               @heaths @RickWinter @LarryOsterman
 
 # AzureSDKOwners: @heaths
 # ServiceLabel: %Azure.Identity
 # PRLabel: %Azure.Identity
-/sdk/identity/           @heaths @RickWinter @JeffreyRichter @LarryOsterman
+/sdk/identity/           @heaths @RickWinter @LarryOsterman
 
 ###########
 # Client SDKs
@@ -54,7 +54,7 @@
 # AzureSDKOwners: @heaths
 # ServiceLabel: %Storage
 # PRLabel: %Storage
-/sdk/storage/           @heaths @RickWinter @JeffreyRichter @LarryOsterman @vincenttran-msft @jalauzon-msft
+/sdk/storage/           @heaths @RickWinter @LarryOsterman @vincenttran-msft @jalauzon-msft
 
 # AzureSDKOwners: @heaths
 # ServiceOwner: @Pilchie