Remove MAKE_SKIP_PATH, update Dockerfile base image

Author: guseggert

Dockerfile

@@ -1,5 +1,5 @@
 # Note: when updating the go minor version here, also update the go-channel in snap/snapcraft.yml
-FROM golang:1.16.3-buster
+FROM golang:1.16.6-buster
 LABEL maintainer="Steven Allen <[email protected]>"
 
 # Install deps

test/sharness/Rules.mk

@@ -26,8 +26,6 @@ DEPS_$(d) += $(PLUGINS_$(d))
 endif
 endif
 
-#export MAKE_SKIP_PATH=1
-
 $(T_$(d)): $$(DEPS_$(d)) # use second expansion so coverage can inject dependency
 	@echo "*** $@ ***"
 ifeq ($(CONTINUE_ON_S_FAILURE),1)