Issue 92: Fix ci build failure due to cargo clean bug. (#93)

Workaround for cargo clean bug rust-lang/cargo#8149

Signed-off-by: Sandeep <sandeep.shridhar@emc.com>

.github/workflows/cibuild.yml

@@ -49,12 +49,6 @@ jobs:
           override: true
           components: rustfmt, clippy
 
-      - name: Run cargo clean
-        uses: actions-rs/cargo@v1
-        with:
-          command: clean  
-          args: -p pravega-controller-client -p pravega-wire-protocol -p pravega-client-rust -p pravega-rust-client-shared
-
       - name: Run cargo check
         uses: actions-rs/cargo@v1
         with:
@@ -98,12 +92,6 @@ jobs:
           override: true
           components: rustfmt, clippy
 
-      - name: Run cargo clean
-        uses: actions-rs/cargo@v1
-        with:
-          command: clean  
-          args: -p pravega-controller-client -p pravega-wire-protocol -p pravega-client-rust -p pravega-rust-client-shared
-
       - name: Run cargo test
         uses: actions-rs/cargo@v1
         with:
@@ -196,8 +184,9 @@ jobs:
       - name: Run cargo clean
         uses: actions-rs/cargo@v1
         with:
-          command: clean  
-          args: -p pravega-controller-client -p pravega-wire-protocol -p pravega-client-rust -p pravega-rust-client-shared
+          command: clean
+          #Clean selected modules once https://github.com/rust-lang/cargo/issues/8149 is fixed.
+          #args: -p pravega-controller-client -p pravega-wire-protocol -p pravega-client-rust -p pravega-rust-client-shared
 
       - name: Run cargo clippy
         uses: actions-rs/cargo@v1

integration_test/build.rs

@@ -1,6 +1,5 @@
 use flate2::read::GzDecoder;
 use log::info;
-use reqwest;
 use std::fs::File;
 use std::io;
 use std::path::Path;

src/event_stream_writer.rs

@@ -18,7 +18,6 @@ use rand::rngs::SmallRng;
 use rand::{Rng, SeedableRng};
 use snafu::ResultExt;
 
-use tokio;
 use tokio::sync::mpsc::{channel, Receiver, Sender};
 use tokio::sync::oneshot;
 use tracing::{debug, error, warn};