All variables from .env are already exported

Author: hschimpf

Makefile

@@ -28,14 +28,6 @@ else
   export BAKE_COMMAND = docker buildx bake
 endif
 
-# Define ZTS build flag
-ifeq ($(ENABLE_ZTS), 1) # is $ENABLE_ZTS=="1"
-  $(info "⚠️  Building with ZTS enabled")
-  export ENABLE_ZTS = --enable-zts
-else
-  export ENABLE_ZTS =
-endif
-
 # Build all Docker images and layers *locally*
 # Use this to test your changes
 default: docker-images layers