Remove code owners for low risk files

Author: peterschrammel

CODEOWNERS

@@ -43,8 +43,6 @@ jbmc/src/jdiff/ @smowton @mgudemann @cristina-david @cesaro @pkesseli @peterschr
 src/cpp/ @kroening @tautschnig @peterschrammel
 
 
-# These files change frequently and changes are low-risk
+# All remaining files are assumed to be low-risk
+# Any two reviewers can be assigned
 
-scripts/ @diffblue/devops @thk123 @forejtv @peterschrammel
-.travis.yml @diffblue/devops @thk123 @forejtv @peterschrammel
-appveyor.yml @diffblue/devops @thk123 @forejtv @peterschrammel