Update azure-pipelines.yml to remove rustup target

Removed rustup target addition from the install script.

Author: jaebeom-kim

azure-pipelines.yml

@@ -39,7 +39,8 @@ jobs:
         submodules: true
       - script: |
           sudo apt-get update
-          sudo apt-get install -y gcc-11 g++-11 libgcc-11-dev rustc cargo build-essential
+          sudo apt-get install -y gcc-11 g++-11 libgcc-11-dev build-essential
+        retryCountOnTaskFailure: "2"
         displayName: Install newer GCC
       - script: |
           sudo apt-get update
@@ -99,7 +100,6 @@ jobs:
           HEREDOC
           sudo apt-get update
           sudo apt-get -y install -o APT::Immediate-Configure=false crossbuild-essential-$ARCH zlib1g-dev:$ARCH libbz2-dev:$ARCH
-          rustup target add ${CPREF}-unknown-linux-gnu
         displayName: Install Toolchain
       - script: |
           mkdir build && cd build