Remove submodule related stuff from action system

Author: gpospelov

.github/workflows/linux-build.yml

@@ -14,14 +14,12 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-      with: 
-        submodules: true    
 
     - name: setup dependencies
       run: |
         sudo apt-get update
         sudo apt-get install -y build-essential cmake ccache \
-          cmake qt5-default qttools5-dev libqt5svg5-dev qtdeclarative5-dev libx11-xcb1
+          cmake qt5-default qttools5-dev libqt5svg5-dev qtdeclarative5-dev libx11-xcb1 libgtest-dev
         
     - name: ccache timestamp
       id: ccache_cache_timestamp

.github/workflows/macos-build.yml

@@ -14,8 +14,6 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-      with: 
-        submodules: true    
 
     - name: dependencies
       run: |

.github/workflows/windows-build.yml

@@ -18,8 +18,6 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-      with: 
-        submodules: true    
 
     - name: Install Qt
       uses: jurplel/install-qt-action@v2