CHECK_RELEASE is in CONFIG_SITE

configure/Makefile

@@ -2,14 +2,6 @@ TOP=..
 
 include $(TOP)/configure/CONFIG
 
-# CHECK_RELEASE controls the consistency checking of the support
-# applications defined in the $(TOP)/configure/RELEASE* files.
-# Normally CHECK_RELEASE should be set to YES.
-# Set CHECK_RELEASE to NO to disable checking completely.
-# Set CHECK_RELEASE to WARN to perform consistency checking,
-# but continue the build even if conflicts are found.
-CHECK_RELEASE = YES
-
 TARGETS = $(CONFIG_TARGETS)
 CONFIGS += $(subst ../,,$(wildcard $(CONFIG_INSTALLS)))