Tidy up CLIPPY_DENY and have clippy target also use DENY

This is neater and more uniform.

Signed-off-by: mulhern <[email protected]>

Makefile

@@ -33,8 +33,7 @@ CLIPPY_DENY = -D clippy::pedantic \
               -A clippy::single_match_else \
               -A clippy::too_many_lines \
               -A clippy::unseparated_literal_suffix \
-              -A clippy::unused_self \
-              -D warnings
+              -A clippy::unused_self
 
 ${HOME}/.cargo/bin/cargo-outdated:
 	cargo install cargo-outdated
@@ -124,7 +123,7 @@ stratisd.8.gz: stratisd.8
 	gzip --stdout docs/stratisd.8 > docs/stratisd.8.gz
 
 clippy:
-	cargo clippy --all-targets --all-features -- ${CLIPPY_DENY}
+	cargo clippy --all-targets --all-features -- ${DENY} ${CLIPPY_DENY}
 
 .PHONY:
 	audit