ci: remove cache

.maintain/ci/build_script.sh

@@ -14,7 +14,7 @@ case $TARGET in
 	# Without WASM
 	"native")
 		# There is some issue to build on ci server with SKIP_WASM_BUILD=1 
-		cargo build --release --all --locked "$@"
+		cargo build --all --locked "$@"
 		echo -e "\e[0;32m +-------------+ \n\e[0;32m | Native Pass | \n\e[0;32m +-------------+ \e[0m"
 		;;
 

.maintain/ci/darwinia_test_script.sh

@@ -15,7 +15,7 @@ case $TARGET in
 	# Without WASM
 	"native")
 		# There is some issue to build on ci server with SKIP_WASM_BUILD=1 
-		cargo test -p darwinia-${1}
+		TARGET=native cargo test -p darwinia-${1}
 		echo -e "\e[0;32m +------------+ \n\e[0;32m  | ${1}  Pass | \n\e[0;32m  +------------+ \e[0m"
 		;;
 

.travis.yml

@@ -2,11 +2,6 @@ language: rust
 rust:
   - nightly
 
-cache: 
-  cargo: true
-  directories:
-   - target
-
 branches:
     only:
         - master
@@ -19,12 +14,11 @@ env:
 before_install:
     # Check how much space we've got on this machine.
     - df -h
-    # TODO: cache the toolchain 
     - rustup target add wasm32-unknown-unknown
 
 jobs:
   include:
-    - stage: Check
+    - stage: Check & Prepare
       script: .maintain/ci/fmt_script.sh
 
     - stage: Build
@@ -51,10 +45,6 @@ jobs:
       env: RUST_TOOLCHAIN=nightly TARGET=native
       script: .maintain/ci/test_script.sh
 
-    # clean up cache 
-    - stage: Cleanup  
-      script: cargo clean
-
 after_script:
     # Check how much free disk space left after the build
     - df -h