Fix node-template-release and make cargo doc faster (#3019)

substrate/.gitlab-ci.yml

@@ -242,7 +242,7 @@ build-rust-doc-release:
   <<:                              *build-only
   script:
     - rm -f ./crate-docs/index.html # use it as an indicator if the job succeeds
-    - time cargo +nightly doc --release --all --verbose
+    - BUILD_DUMMY_WASM_BINARY=1 time cargo +nightly doc --release --all --verbose
     - cp -R ./target/doc ./crate-docs
     - echo "<meta http-equiv=refresh content=0;url=substrate_service/index.html>" > ./crate-docs/index.html
     - sccache -s

substrate/scripts/node-template-release/src/main.rs

@@ -136,9 +136,6 @@ fn write_cargo_toml(path: &Path, cargo_toml: CargoToml) {
 
 /// Build and test the generated node-template
 fn build_and_test(path: &Path, cargo_tomls: &[PathBuf]) {
-	// Build wasm
-	assert!(Command::new(path.join("./scripts/build.sh")).current_dir(path).status().expect("Compiles wasm").success());
-
 	// Build node
 	assert!(Command::new("cargo").args(&["build", "--all"]).current_dir(path).status().expect("Compiles node").success());