Remove/Replace ex-Googlers in OWNERS

CODEOWNERS

@@ -8,10 +8,10 @@
 sigs/rust/ @adamcrume
 sigs/tensorboard/ @ewilderj @manivaradarajan
 sigs/build/ @ewilderj @angerson @perfinion
-sigs/addons/ @ewilderj @karmel @seanpmorgan @armando-fandango
+sigs/addons/ @ewilderj @seanpmorgan @armando-fandango
 sigs/networking/ @ewilderj @byronyi @jbedorf @poxvoculi
-sigs/io/ @ewilderj @mrry @yongtang @dmitrievanthony
-sigs/jvm/ @ewilderj @sjamesr @karllessard @tzolov
+sigs/io/ @ewilderj @mihaimaruseac @yongtang @dmitrievanthony
+sigs/jvm/ @ewilderj @karllessard @tzolov
 sigs/micro/ @ewilderj @petewarden
 sigs/mlir/ @ewilderj @pkanwar23
 sigs/swift/ @ewilderj @saeta @ematejska