diff --git a/.gitignore b/.gitignore
index f7d2fae6eff1565c5257abe397f6b4e5c9bd7cdb..52c69f2e68d549d3c9804c8102f291d6de8658c7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,5 +21,3 @@ __pycache__
 require-ess/require.Makefile
 require-ess/Db/*.db
 require-ess/Db/*.d
-e3.cfg
-tools/ess-env.conf
diff --git a/configure/E3/DEFINES_REQUIRE b/configure/E3/DEFINES_REQUIRE
deleted file mode 100644
index c457312bbf2907f50e9d58761ef91d9baf9bb37b..0000000000000000000000000000000000000000
--- a/configure/E3/DEFINES_REQUIRE
+++ /dev/null
@@ -1,34 +0,0 @@
-
-# Generate E3 setE3Env.bash configuration
-
-# Remove the genrated indent
-define G_E3_VAR0
-endef
-
-# EPICS_BASE
-define G_E3_VAR1
-declare -g DEFAULT_EPICS_BASE=$(E3_MODULES_PATH)
-endef
-
-# E3_REQUIRE_NAME
-define G_E3_VAR2
-declare -g DEFAULT_REQUIRE_NAME=$(E3_REQUIRE_NAME)
-endef
-
-
-# E3_REQUIRE_VERSION
-
-define G_E3_VAR3
-declare -g DEFAULT_REQUIRE_VERSION=$(E3_REQUIRE_VERSION)
-endef
-
-define E3_CFG_VARS :=
-$(G_E3_VAR0)
-$(G_E3_VAR1)
-$(G_E3_VAR2)
-$(G_E3_VAR3)
-endef
-
-
-VARS_EXCLUDES+=E3_CFG_VARS
-VARS_EXCLUDES+=G_E3_VAR0
diff --git a/configure/RULES b/configure/RULES
index 49e2bba9ac5185131d91e86a39aee2e2fe70f329..e35fe641f195cbab110fa222817a460d3d67819c 100644
--- a/configure/RULES
+++ b/configure/RULES
@@ -5,7 +5,6 @@ include $(TOP)/configure/E3/DEFINES_FT
 #
 # We cannot use file operation in CentOS7.4,
 # because Makefile version is 3.8.
-# include $(TOP)/configure/E3/DEFINES_REQUIRE
 include $(TOP)/configure/E3/RULES_E3
 include $(TOP)/configure/E3/RULES_EPICS