Remove myself from CODEOWNERS for SignalR (#8434)

I love me some SignalR but with BRT and such I need to focus my notifications :'(

Remove myself from CODEOWNERS for SignalR (#8434)
e6d77a1f · Andrew Stanton-Nurse · GitHub · afeb139a · e6d77a1f
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -15,4 +15,4 @@
 /src/Servers/ @tratcher @jkotalik
 /src/Middleware/Rewrite @jkotalik
 /src/Middleware/HttpsPolicy @jkotalik
-/src/SignalR/ @mikaelm12 @BrennanConroy @halter73 @anurse
+/src/SignalR/ @mikaelm12 @BrennanConroy @halter73