Revert "I hate submodules. Why did it have to be submodules? (#6117)"

This reverts commit d3b13a6c83.

.github/workflows/build-docfx.yml

@@ -12,21 +12,12 @@ jobs:
     - name: Setup submodule
       run: |
         git submodule update --init --recursive
-        pushd RobustToolbox/Lidgren.Network/Lidgren.Network
-        git fetch
-        git checkout 726dd552a4b104fb2b701848705f1250a073f060
-        popd
     - name: Pull engine updates
       uses: space-wizards/submodule-dependency@v0.1.5
     - name: Update Engine Submodules
       run: |
         cd RobustToolbox/
         git submodule update --init --recursive
-        pushd Lidgren.Network/Lidgren.Network
-        git fetch
-        git checkout 726dd552a4b104fb2b701848705f1250a073f060
-        popd
-
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v4.1.0
       with:

.github/workflows/build-map-renderer.yml

@@ -24,11 +24,7 @@ jobs:
       - name: Setup Submodule
         run: |
           git submodule update --init --recursive
-          pushd RobustToolbox/Lidgren.Network/Lidgren.Network
-          git fetch
-          git checkout 726dd552a4b104fb2b701848705f1250a073f060
-          popd
-          
+
       - name: Pull engine updates
         uses: space-wizards/submodule-dependency@v0.1.5
 
@@ -36,10 +32,6 @@ jobs:
         run: |
           cd RobustToolbox/
           git submodule update --init --recursive
-          pushd Lidgren.Network/Lidgren.Network
-          git fetch
-          git checkout 726dd552a4b104fb2b701848705f1250a073f060
-          popd
 
       - name: Setup .NET Core
         uses: actions/setup-dotnet@v4.1.0

.github/workflows/build-test-debug.yml

@@ -24,10 +24,6 @@ jobs:
     - name: Setup Submodule
       run: |
         git submodule update --init --recursive
-        pushd RobustToolbox/Lidgren.Network/Lidgren.Network
-        git fetch
-        git checkout 726dd552a4b104fb2b701848705f1250a073f060
-        popd
 
     - name: Pull engine updates
       uses: space-wizards/submodule-dependency@v0.1.5
@@ -36,10 +32,6 @@ jobs:
       run: |
         cd RobustToolbox/
         git submodule update --init --recursive
-        pushd Lidgren.Network/Lidgren.Network
-        git fetch
-        git checkout 726dd552a4b104fb2b701848705f1250a073f060
-        popd
 
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v4.1.0

.github/workflows/publish.yml

@@ -20,7 +20,6 @@ jobs:
     - uses: actions/checkout@v4.2.2
       with:
         submodules: 'recursive'
-
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v4.1.0
       with:
@@ -31,12 +30,6 @@ jobs:
         cd RobustToolbox
         git fetch --depth=1
 
-    - name: Get Engine Tag
-      run: |
-        cd RobustToolbox/Lidgren.Network/Lidgren.Network
-        git fetch
-        git checkout 726dd552a4b104fb2b701848705f1250a073f060
-
     - name: Install dependencies
       run: dotnet restore
 

.github/workflows/test-packaging.yml

@@ -39,10 +39,6 @@ jobs:
       - name: Setup Submodule
         run: |
           git submodule update --init --recursive
-          pushd RobustToolbox/Lidgren.Network/Lidgren.Network
-          git fetch
-          git checkout 726dd552a4b104fb2b701848705f1250a073f060
-          popd
 
       - name: Pull engine updates
         uses: space-wizards/submodule-dependency@v0.1.5
@@ -51,10 +47,6 @@ jobs:
         run: |
           cd RobustToolbox/
           git submodule update --init --recursive
-          pushd Lidgren.Network/Lidgren.Network
-          git fetch
-          git checkout 726dd552a4b104fb2b701848705f1250a073f060
-          popd
 
       - name: Setup .NET Core
         uses: actions/setup-dotnet@v4.1.0

.github/workflows/yaml-linter.yml

@@ -17,20 +17,12 @@ jobs:
       - name: Setup submodule
         run: |
           git submodule update --init --recursive
-          pushd RobustToolbox/Lidgren.Network/Lidgren.Network
-          git fetch
-          git checkout 726dd552a4b104fb2b701848705f1250a073f060
-          popd
       - name: Pull engine updates
         uses: space-wizards/submodule-dependency@v0.1.5
       - name: Update Engine Submodules
         run: |
           cd RobustToolbox/
           git submodule update --init --recursive
-          pushd Lidgren.Network/Lidgren.Network
-          git fetch
-          git checkout 726dd552a4b104fb2b701848705f1250a073f060
-          popd
       - name: Setup .NET Core
         uses: actions/setup-dotnet@v4.1.0
         with: